diff --git a/.dev/test.py b/.dev/test.py
deleted file mode 100644
index f4946ed980f5fac2df8542470e22ee82b8d2c871..0000000000000000000000000000000000000000
--- a/.dev/test.py
+++ /dev/null
@@ -1,91 +0,0 @@
-from ohmpi.ohmpi import OhmPi
-import matplotlib.pyplot as plt
-import numpy as np
-
-a = np.arange(13) + 1
-b = a + 3
-m = a + 1
-n = a + 2
-seq = np.c_[a, b, m, n]
-
-k = OhmPi(idps=False)
-k.settings['injection_duration'] = 1
-k.settings['nb_stack'] = 1
-k.settings['nbr_meas'] = 1
-k.sequence = seq
-k.reset_mux()
-k.switch_mux_on([1, 4, 2, 3])
-#k.switch_mux_on([12, 15, 13, 14])
-#k.measure(strategy='vmax')
-#print('vab', k.compute_tx_volt(strategy='vmin'))
-#k.rs_check()
-out = k.run_measurement(quad=[3, 3, 3, 3], nb_stack=1, tx_volt=12, strategy='constant', autogain=True)
-#k.reset_mux()
-#k.rs_check(tx_volt=12)
-
-# x = []
-#for i in range(3):
-#    out = k.run_measurement(injection_duration=2, nb_stack=2, strategy='constant', tx_volt=5, autogain=False)
-    #x.append(out['R [ohm]'])
-    #k.append_and_save('out.csv', out)
-
-data = out['fulldata']
-inan = ~np.isnan(data[:,0])
-
-if True:
-    fig, axs = plt.subplots(2, 1, sharex=True)
-    ax = axs[0]
-    ax.plot(data[inan,2], data[inan,0], 'r.-', label='current [mA]')
-    ax.set_ylabel('Current AB [mA]')
-    ax = axs[1]
-    ax.plot(data[inan,2], data[inan,1], '.-', label='voltage [mV]')
-    ax.set_ylabel('Voltage MN [mV]')
-    ax.set_xlabel('Time [s]')
-    plt.show()
-    
-#     fig,ax=plt.subplots()
-#     
-#    
-#     ax.plot(data[inan,2], data[inan,0],  label='current [mA]', marker="o")
-#     ax2=ax.twinx()
-#     ax2.plot(data[inan,2], data[inan,1],'r.-' , label='current [mV]')
-#     ax2.set_ylabel('Voltage [mV]', color='r')
-#     ymin=-50
-#     ymax=50
-#     ymin1=-4500
-#     ymax1= 4500
-#     ax.set_ylim([ymin,ymax])
-#     ax2.set_ylim([ymin1,ymax1])
-#     
-#     plt.show()
-    
-
-
-if False:
-    from numpy.fft import fft, ifft
-
-    x = data[inan, 1][10:300]
-    t = np.linspace(0, len(x)*4, len(x))
-    sr = 1/0.004
-
-    X = fft(x)
-    N = len(X)
-    n = np.arange(N)
-    T = N/sr
-    freq = n/T 
-
-    plt.figure(figsize = (12, 6))
-    plt.subplot(121)
-
-    plt.stem(freq, np.abs(X), 'b', \
-             markerfmt=" ", basefmt="-b")
-    plt.xlabel('Freq (Hz)')
-    plt.ylabel('FFT Amplitude |X(freq)|')
-    #plt.xlim(0, 10)
-
-    plt.subplot(122)
-    plt.plot(t, ifft(X), 'r')
-    plt.xlabel('Time (s)')
-    plt.ylabel('Amplitude')
-    plt.tight_layout()
-    plt.show()
diff --git a/.dev/test_mb_2023_4_mux_2023.py b/.dev/test_mb_2023_4_mux_2023.py
index 2841a90d1f53f85ed13e8abceb646b5129f441cf..045afb0425e434c0d1b1cf90c62483dbac8dc174 100644
--- a/.dev/test_mb_2023_4_mux_2023.py
+++ b/.dev/test_mb_2023_4_mux_2023.py
@@ -89,7 +89,7 @@ if within_ohmpi:
     k.reset_mux()
     # k.run_multiple_sequences(sequence_delay=20, nb_meas=3)
     k.run_sequence(injection_duration=0.2)
-    # k.rs_check(tx_volt=4)
+    # k.rs_check(vab=4)
     # k.test_mux(mux_id=None, activation_time=0.2)
     # k._hw.switch_mux([A, B, M, N], state='on')
     # k._hw.vab_square_wave(12.,1., cycles=2)
diff --git a/.dev/test_mb_2024_3_mux_2024.py b/.dev/test_mb_2024_3_mux_2024.py
index c71984694f0de520a8d0199f64578d379cdcdf9e..f34b996418e27c8c7bc0993c103ca7ee02cb76d6 100644
--- a/.dev/test_mb_2024_3_mux_2024.py
+++ b/.dev/test_mb_2024_3_mux_2024.py
@@ -92,7 +92,7 @@ if within_ohmpi:
     # A, B, M, N = (32, 29, 31, 30)
     k.reset_mux()
     k.load_sequence('sequences/ABMN2.txt')
-    k.run_sequence(tx_volt=50, injection_duration=1., nb_stack=2, duty_cycle=0.5)
+    k.run_sequence(vab=50, injection_duration=1., nb_stack=2, duty_cycle=0.5)
     print('using OhmPi')
     #d = k.run_measurement([A, B, M, N], injection_duration=1., nb_stack=2, duty_cycle=0.5)
     # print(d)
diff --git a/.dev/test_mb_2024_4_mux_2023.py b/.dev/test_mb_2024_4_mux_2023.py
index d0700b5a241004a238865277e513f357ce1c8d2b..59a8fbbbcbab29029b2338a38f6678020ec5d5bb 100644
--- a/.dev/test_mb_2024_4_mux_2023.py
+++ b/.dev/test_mb_2024_4_mux_2023.py
@@ -98,7 +98,7 @@ if within_ohmpi:
     k._hw._plot_readings()
     # k.load_sequence('sequences/test_circuit_1423.txt')
     #k.load_sequence('sequences/wenner1-16.txt')
-    # k.run_sequence(tx_volt=5, injection_duration=1., nb_stack=2, duty_cycle=0.5)
+    # k.run_sequence(vab=5, injection_duration=1., nb_stack=2, duty_cycle=0.5)
     print('using OhmPi')
     #d = k.run_measurement([A, B, M, N], injection_duration=1., nb_stack=2, duty_cycle=0.5)
     #print(d)
diff --git a/.dev/test_mb_2024_4_mux_2023_dps5005.py b/.dev/test_mb_2024_4_mux_2023_dps5005.py
index d2877b1424fb4d2b64a722d5e03406677762f159..3bbd899eba676bd7fcf43d0ea7cd9b9aab1a674a 100644
--- a/.dev/test_mb_2024_4_mux_2023_dps5005.py
+++ b/.dev/test_mb_2024_4_mux_2023_dps5005.py
@@ -77,14 +77,13 @@ if part_of_hardware_system:
 if within_ohmpi:
     from ohmpi.ohmpi import OhmPi
     # from ohmpi.plots import plot_exec_log
-
     print('Starting test with OhmPi.')
     k = OhmPi()
-    # A, B, M, N = (32, 29, 31, 30)
-    # k.reset_mux()
+    k.reset_mux()
     # k.create_sequence(nelec=6, params=[('wenner', 1)], ireciprocal=True)
-    # print(k.sequence)
-    # k.run_sequence(cycles=1, tx_vold=5, cycle_duration=0.2)
+    # k.rs_check()
+    print(k.sequence)
+    k.run_sequence(cycles=1, vab=5, strategy='constant', injection_duration=1)
     # k.plot_last_fw()
     k.export(ftype='bert')
     # k.export(fnames=['data/measurements_20240226T180635.csv'], ftype='bert')
@@ -99,6 +98,7 @@ if within_ohmpi:
     # k._hw._plot_readings()
     # A, B, M, N = (1, 4, 2, 3)
     # A, B, M, N = (5, 8, 6, 7)
+    # A, B, M, N = (32, 29, 31, 30)
     # k._hw.switch_mux([A, B, M, N], state='on')
     # k._hw.vab_square_wave(5., cycle_duration=0.500, cycles=2, duty_cycle=0.5) 
     # k._hw.switch_mux([A, B, M, N], state='off')
@@ -106,8 +106,8 @@ if within_ohmpi:
     # if k._hw.sp is None:
         # k._hw.sp = 0  # if not off-time, sp is None
     # k._hw._plot_readings()
-    # k.load_sequence('sequences/test_circuit_1423.txt')
-    # k.run_sequence(tx_volt=5, injection_duration=1., nb_stack=2, duty_cycle=0.5)
+    k.load_sequence('sequences/wenner1-16.txt')
+    # k.run_sequence(vab=5, injection_duration=.2, nb_stack=1, duty_cycle=1)
     print('using OhmPi')
     #d = k.run_measurement([A, B, M, N], injection_duration=1., nb_stack=2, duty_cycle=0.5)
     #print(d)
diff --git a/.dev/test_mb_2024_4_mux_2024.py b/.dev/test_mb_2024_4_mux_2024.py
index 48ff0f36c6113106d5ca3b0d2d4bbcd958c09297..39fd7d7606963deb49f9b1aa8199c8698dfca295 100644
--- a/.dev/test_mb_2024_4_mux_2024.py
+++ b/.dev/test_mb_2024_4_mux_2024.py
@@ -110,9 +110,9 @@ if within_ohmpi:
     # print(f'OhmPiHardware Resistance: {k._hw.last_rho :.2f} ohm, dev. {k._hw.last_dev:.2f} %, rx bias: {k._hw.rx._bias:.2f} mV')
     # k._hw._plot_readings()
     # k.load_sequence('sequences/9991_GRAD_16_s1_a1.txt')
-    # k.run_sequence(tx_volt=5, injection_duration=1., nb_stack=2, duty_cycle=0.5)
+    # k.run_sequence(vab=5, injection_duration=1., nb_stack=2, duty_cycle=0.5)
     # print('using OhmPi')
-    d = k.run_measurement([A, B, M, N], injection_duration=1., nb_stack=2, duty_cycle=0.5, tx_volt=42., strategy='vmax', vab_max=40., delay=0.01)
+    d = k.run_measurement([A, B, M, N], injection_duration=1., nb_stack=2, duty_cycle=0.5, vab=42., strategy='vmax', vab_max=40., delay=0.01)
     print(d)
     k._hw._plot_readings()
     # print(f'OhmPiHardware: Resistance: {k._hw.last_resistance() :.2f} ohm, dev. {k._hw.last_dev():.2f} %, sp: {k._hw.sp:.2f} mV, rx bias: {k._hw.rx._bias:.2f} mV')
diff --git a/.dev/test_mb_2024_4_mux_2024_4_mux_2023.py b/.dev/test_mb_2024_4_mux_2024_4_mux_2023.py
index a53e8662aa5cd304a4a2ccb35b22911fc560ac78..1c4d03bcd29ab175a5a889bb5a7b6a44d93bca90 100644
--- a/.dev/test_mb_2024_4_mux_2024_4_mux_2023.py
+++ b/.dev/test_mb_2024_4_mux_2024_4_mux_2023.py
@@ -103,7 +103,7 @@ if within_ohmpi:
     # print(f'OhmPiHardware Resistance: {k._hw.last_rho :.2f} ohm, dev. {k._hw.last_dev:.2f} %, rx bias: {k._hw.rx._bias:.2f} mV')
     # k._hw._plot_readings()
     # k.load_sequence('sequences/9991_GRAD_16_s1_a1.txt')
-    # k.run_sequence(tx_volt=5, injection_duration=1., nb_stack=2, duty_cycle=0.5)
+    # k.run_sequence(vab=5, injection_duration=1., nb_stack=2, duty_cycle=0.5)
     print('using OhmPi')
     #d = k.run_measurement([A, B, M, N], injection_duration=1., nb_stack=2, duty_cycle=0.5)
     # print(d)
diff --git a/configs/config_default.py b/configs/config_default.py
index 411cad0432beea238964192e620b155581d159bf..c83a4728edc861870d1ffd3e966d041a32e85860 100644
--- a/configs/config_default.py
+++ b/configs/config_default.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2023.py b/configs/config_mb_2023.py
index 2ef5840f340365957675fa25ba53edc582dd971f..5443691112abbb38a8866765a8c2bec07830d839 100644
--- a/configs/config_mb_2023.py
+++ b/configs/config_mb_2023.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2023__1_mux_2024_4roles.py b/configs/config_mb_2023__1_mux_2024_4roles.py
index b1c64d6d170e0fcb348bcf752c6cae5f9f6216ba..319207eeb191ce493eb9cd9d5da24a4d975e71b2 100644
--- a/configs/config_mb_2023__1_mux_2024_4roles.py
+++ b/configs/config_mb_2023__1_mux_2024_4roles.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2023__2_mux_2024_2roles.py b/configs/config_mb_2023__2_mux_2024_2roles.py
index 6f14a8215b00aff7c3d5a783d08009cb623f6f8f..61be8588a8063da420f99a2dc1e36e9d2a3a145f 100644
--- a/configs/config_mb_2023__2_mux_2024_2roles.py
+++ b/configs/config_mb_2023__2_mux_2024_2roles.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2023__2_mux_2024_4roles.py b/configs/config_mb_2023__2_mux_2024_4roles.py
index 36cbbc41e1129c452b84e22a44b1578efec644e4..6449f86771aff945594c6b6da9ea58f97f4aa4c2 100644
--- a/configs/config_mb_2023__2_mux_2024_4roles.py
+++ b/configs/config_mb_2023__2_mux_2024_4roles.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2023__3_mux_2024_4roles.py b/configs/config_mb_2023__3_mux_2024_4roles.py
index 0edb73c153794cf03c3534ffca4736222d0ecda0..5039251734567eab686fd156e85deb9e3a3ab889 100644
--- a/configs/config_mb_2023__3_mux_2024_4roles.py
+++ b/configs/config_mb_2023__3_mux_2024_4roles.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2023__4_mux_2023.py b/configs/config_mb_2023__4_mux_2023.py
index 66e7ec87b7b246b6f3646c11e27c187b825fc60d..16b57777be236de6c15721bf17f2ea9f78a3595a 100644
--- a/configs/config_mb_2023__4_mux_2023.py
+++ b/configs/config_mb_2023__4_mux_2023.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2023__4_mux_2024_2roles.py b/configs/config_mb_2023__4_mux_2024_2roles.py
index 4735f2c7e256860d0ccb82133d4f5425516aba7b..7b13a70d838c631d1c144e5160febe056eec97bc 100644
--- a/configs/config_mb_2023__4_mux_2024_2roles.py
+++ b/configs/config_mb_2023__4_mux_2024_2roles.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2023__4_mux_2024_4roles.py b/configs/config_mb_2023__4_mux_2024_4roles.py
index 9b979829d86fee070d1b57bc79fae639f2a8d4eb..0b3da7543988c06fb568f8061a3c8796558971f3 100644
--- a/configs/config_mb_2023__4_mux_2024_4roles.py
+++ b/configs/config_mb_2023__4_mux_2024_4roles.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2.py b/configs/config_mb_2024_0_2.py
index de3c949ece8eeab1ea9673d9518ffec666816bf7..23c77aa7011712a1985e1de6f231b9001e37de74 100644
--- a/configs/config_mb_2024_0_2.py
+++ b/configs/config_mb_2024_0_2.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__1_mux_2024_4roles.py b/configs/config_mb_2024_0_2__1_mux_2024_4roles.py
index 4d0bf01738d56560e87ee36ec7983b485639a4c2..d337f4a61f7b9f7268602b1d78048557ccad0baa 100644
--- a/configs/config_mb_2024_0_2__1_mux_2024_4roles.py
+++ b/configs/config_mb_2024_0_2__1_mux_2024_4roles.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__1_mux_2024_4roles_dps5005.py b/configs/config_mb_2024_0_2__1_mux_2024_4roles_dps5005.py
index 42622a821798bbe02fe9c3e821c5e74bb87002e3..2c3e5b129f0c1b14dc720c6dff3dfb1e3b1ad539 100644
--- a/configs/config_mb_2024_0_2__1_mux_2024_4roles_dps5005.py
+++ b/configs/config_mb_2024_0_2__1_mux_2024_4roles_dps5005.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__2_mux_2024_2roles.py b/configs/config_mb_2024_0_2__2_mux_2024_2roles.py
index a08d907948e39d187007cfb07fe6da7d61156aa2..8741734e3fec72f7d2aed27a567df686205006e9 100644
--- a/configs/config_mb_2024_0_2__2_mux_2024_2roles.py
+++ b/configs/config_mb_2024_0_2__2_mux_2024_2roles.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__2_mux_2024_2roles_dps5005.py b/configs/config_mb_2024_0_2__2_mux_2024_2roles_dps5005.py
index 93aaadb4fb49f16b8fc0bfb8681080a8861c9a65..66f0856b9c56fdf826a85c3bfbb949961ec8b6cf 100644
--- a/configs/config_mb_2024_0_2__2_mux_2024_2roles_dps5005.py
+++ b/configs/config_mb_2024_0_2__2_mux_2024_2roles_dps5005.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__2_mux_2024_4roles.py b/configs/config_mb_2024_0_2__2_mux_2024_4roles.py
index 9b50b845e52b1824a4f4317a1ca6890b837c8feb..89317c1dad98489c1b01fd5c28ba4b6e70af1527 100644
--- a/configs/config_mb_2024_0_2__2_mux_2024_4roles.py
+++ b/configs/config_mb_2024_0_2__2_mux_2024_4roles.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__2_mux_2024_4roles_dps5005.py b/configs/config_mb_2024_0_2__2_mux_2024_4roles_dps5005.py
index 16dfee2b86b6477d9ad2695516fe03828d9f6fb7..5093dc7e841d7d532acf31216e135af0cae15bbd 100644
--- a/configs/config_mb_2024_0_2__2_mux_2024_4roles_dps5005.py
+++ b/configs/config_mb_2024_0_2__2_mux_2024_4roles_dps5005.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__3_mux_2024_4roles.py b/configs/config_mb_2024_0_2__3_mux_2024_4roles.py
index 7e0f9467ebb9f7a52c73fbb8f9ecde308267aad2..b308ca84af7763855ec38c2e5fe8d001be501c9c 100644
--- a/configs/config_mb_2024_0_2__3_mux_2024_4roles.py
+++ b/configs/config_mb_2024_0_2__3_mux_2024_4roles.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__3_mux_2024_4roles_dps5005.py b/configs/config_mb_2024_0_2__3_mux_2024_4roles_dps5005.py
index 028900ed10a8eaff62ff9c5c53c0b0f9aa89fca4..b4a4bef95884be324cda063068cc0703d57dcc90 100644
--- a/configs/config_mb_2024_0_2__3_mux_2024_4roles_dps5005.py
+++ b/configs/config_mb_2024_0_2__3_mux_2024_4roles_dps5005.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__4_mux_2023.py b/configs/config_mb_2024_0_2__4_mux_2023.py
index 6231883053d5a65898d32fc4e54ceadcfd2eb004..a85c8d37b68705fd33d5d7b93ae7f25d7fc18d97 100644
--- a/configs/config_mb_2024_0_2__4_mux_2023.py
+++ b/configs/config_mb_2024_0_2__4_mux_2023.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__4_mux_2023__2_mux_2024_2roles_dps5005.py b/configs/config_mb_2024_0_2__4_mux_2023__2_mux_2024_2roles_dps5005.py
index 4765b7110cc49a5ca596c0ae370f0a19806a1584..00a15870f613ec681f206eef75f5871c7ba6d916 100644
--- a/configs/config_mb_2024_0_2__4_mux_2023__2_mux_2024_2roles_dps5005.py
+++ b/configs/config_mb_2024_0_2__4_mux_2023__2_mux_2024_2roles_dps5005.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__4_mux_2023_dps5005.py b/configs/config_mb_2024_0_2__4_mux_2023_dps5005.py
index 57cd2686ed8f30c6445d53d2a56586e10896a052..30d13e906c6ef07f510dc908a2a8c706a3651d8a 100644
--- a/configs/config_mb_2024_0_2__4_mux_2023_dps5005.py
+++ b/configs/config_mb_2024_0_2__4_mux_2023_dps5005.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__4_mux_2024_2roles.py b/configs/config_mb_2024_0_2__4_mux_2024_2roles.py
index 84c3b009ca979e7b7d281188c5cb2473c518c07b..b4db08099664b279e16060b8a9daf27765e21b01 100644
--- a/configs/config_mb_2024_0_2__4_mux_2024_2roles.py
+++ b/configs/config_mb_2024_0_2__4_mux_2024_2roles.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__4_mux_2024_2roles_dps5005.py b/configs/config_mb_2024_0_2__4_mux_2024_2roles_dps5005.py
index 8ded3e1a5af38d3bf42c3bbe3cf40087166f5c4a..0d0d69ce5ae8fd53c5ee9d0fc2586e842a34d1cc 100644
--- a/configs/config_mb_2024_0_2__4_mux_2024_2roles_dps5005.py
+++ b/configs/config_mb_2024_0_2__4_mux_2024_2roles_dps5005.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__4_mux_2024_4roles.py b/configs/config_mb_2024_0_2__4_mux_2024_4roles.py
index 4710f01e68cecba8b7f6129d59d2486e4ff8f130..d3c1bb27232f4fb4842442efc86fd2b2e28df34c 100644
--- a/configs/config_mb_2024_0_2__4_mux_2024_4roles.py
+++ b/configs/config_mb_2024_0_2__4_mux_2024_4roles.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__4_mux_2024_4roles_dps5005.py b/configs/config_mb_2024_0_2__4_mux_2024_4roles_dps5005.py
index a8130966fae7a983855c5274197a54d1786e2360..0f17446e60eaea2677088991f0b8c7a25024519a 100644
--- a/configs/config_mb_2024_0_2__4_mux_2024_4roles_dps5005.py
+++ b/configs/config_mb_2024_0_2__4_mux_2024_4roles_dps5005.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2__8_mux_2023_dps5005.py b/configs/config_mb_2024_0_2__8_mux_2023_dps5005.py
index 3a7859ef01f729d3a1b3c9e306a0d6581b72f04b..815a38c90361b6dbe91d8bdef5a51527b9f535d8 100644
--- a/configs/config_mb_2024_0_2__8_mux_2023_dps5005.py
+++ b/configs/config_mb_2024_0_2__8_mux_2023_dps5005.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/configs/config_mb_2024_0_2_dps5005.py b/configs/config_mb_2024_0_2_dps5005.py
index f4f7e4083bc3863deb67c03c86cca9314a59b286..5641b8ebfd6ffb6013a78d665c750aeb81fdf99f 100644
--- a/configs/config_mb_2024_0_2_dps5005.py
+++ b/configs/config_mb_2024_0_2_dps5005.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/ohmpi/config.py b/ohmpi/config.py
index 411cad0432beea238964192e620b155581d159bf..c83a4728edc861870d1ffd3e966d041a32e85860 100644
--- a/ohmpi/config.py
+++ b/ohmpi/config.py
@@ -13,7 +13,7 @@ logging_suffix = ''
 # OhmPi configuration
 OHMPI_CONFIG = {
     'id': ohmpi_id,  # Unique identifier of the OhmPi board (string)
-    'settings': 'ohmpi_settings.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
+    'settings': 'settings/default.json',  # INSERT YOUR FAVORITE SETTINGS FILE HERE
 }
 
 r_shunt = 2.
diff --git a/ohmpi/hardware_system.py b/ohmpi/hardware_system.py
index 8142047b2a141a11408fcbaad85e7190c42a3c4f..8b46223b083e657cef68cc6662ad33e05164b0de 100644
--- a/ohmpi/hardware_system.py
+++ b/ohmpi/hardware_system.py
@@ -417,9 +417,9 @@ class OhmPiHardware:
 
         return new_vab
 
-    def compute_tx_volt(self, pulse_duration=0.1, strategy='vmax', tx_volt=5., vab_max=None,
-                        iab_max=None, vmn_max=None, vmn_min=None, polarities=(1, -1), delay=0.05,
-                        p_max=None, diff_vab_lim=2.5, n_steps=4):
+    def compute_vab(self, pulse_duration=0.1, strategy='vmax', vab=5., vab_max=None,
+                    iab_max=None, vmn_max=None, vmn_min=None, polarities=(1, -1), delay=0.05,
+                    p_max=None, diff_vab_lim=2.5, n_steps=4):
         # TODO: Optimise how to pass iab_max, vab_max, vmn_min
         # TODO: Update docstring
         """Estimates best Tx voltage based on different strategies.
@@ -442,10 +442,10 @@ class OhmPiHardware:
             - vmax : compute Vab to reach a maximum Iab without exceeding vab_max
             - vmin : compute Vab to reach at least vmn_min
             - constant : apply given Vab
-        tx_volt : float, optional
+        vab : float, optional
             Voltage to apply for guessing the best voltage. 5 V applied
             by default. If strategy "constant" is chosen, constant voltage
-            to applied is "tx_volt".
+            to applied is "vab".
         vab_max : float, optional
             Maximum injection voltage to apply to tx (used by all strategies)
         vmn_min : float, optional
@@ -460,14 +460,14 @@ class OhmPiHardware:
         rab : float
             Resistance between injection electrodes
         """
-        tx_volt = np.abs(tx_volt)
-        vab_opt = tx_volt
+        vab_opt = np.abs(vab)
 
         if not self.tx.pwr.voltage_adjustable:
             vab_opt = self.tx.pwr.voltage
         else:
-            if strategy == 'full_constant':
-                return tx_volt
+            # TODO what is "full_constant"? maybe just a typo?
+            if strategy == 'full_constant' or strategy == 'constant':
+                return vab
 
             if vmn_max is None:
                 vmn_max = self.rx._voltage_max / 1000.
@@ -483,13 +483,13 @@ class OhmPiHardware:
 
             vab_max = np.abs(vab_max)
             vmn_min = np.abs(vmn_min)
-            # tx_volt = np.abs(tx_volt)
+
             # Set gain at min
             self.rx.reset_gain()
-            # vab_opt = tx_volt
-            if tx_volt >= vab_max:
+
+            if vab >= vab_max:
                 strategy = 'constant'
-            vab = np.min([np.abs(tx_volt), vab_max])
+            vab = np.min([np.abs(vab), vab_max])
             if strategy == 'constant':
                 vab_max = vab
                 vab = vab * .9
@@ -522,12 +522,12 @@ class OhmPiHardware:
                 while (k < n_steps) and (diff_vab > diff_vab_lim) and (vab_list[k] < vab_max):
                     if k>0:
                         self.exec_logger.event(
-                            f'OhmPiHardware\t_compute_tx_volt_sleep\tbegin\t{datetime.datetime.utcnow()}')
+                            f'OhmPiHardware\t_compute_vab_sleep\tbegin\t{datetime.datetime.utcnow()}')
                         time.sleep(
                             0.2)  # TODO: replace this by discharging DPS on resistor with relay on GPIO5 (at least for strategy vmin,
                         # but might be useful in vmax when last vab too high...)
                         self.exec_logger.event(
-                            f'OhmPiHardware\t_compute_tx_volt_sleep\tend\t{datetime.datetime.utcnow()}')
+                            f'OhmPiHardware\t_compute_vab_sleep\tend\t{datetime.datetime.utcnow()}')
                     if strategy == 'vmax':
                         vmn_min = vmn_max
                     vabs = []
@@ -541,13 +541,13 @@ class OhmPiHardware:
                         vabs.append(new_vab)
                         # print(f'new_vab: {new_vab}, diff_vab: {diff_vab}\n')
                         if diff_vab < diff_vab_lim:
-                            self.exec_logger.debug('Compute_tx_volt stopped on vab increase too small')
+                            self.exec_logger.debug('Compute_vab stopped on vab increase too small')
                     k = k + 1
                     vab_list[k] = np.min(vabs)
                     if self.tx.pwr.voltage_adjustable:
                         self.tx.voltage = vab_list[k]
                 if k > n_steps:
-                    self.exec_logger.debug('Compute_tx_volt stopped on maximum number of steps reached')
+                    self.exec_logger.debug('Compute_vab stopped on maximum number of steps reached')
                 vab_opt = vab_list[k]
                 # print(f'Selected Vab: {vab_opt:.2f}')
                 # if switch_pwr_off:
diff --git a/ohmpi/ohmpi.py b/ohmpi/ohmpi.py
index b06a25efeb37720ffa3c60fe0feccee25eae92ad..ca9a3fe592b15bd3176ffcb3346c84d0a6ac3d92 100644
--- a/ohmpi/ohmpi.py
+++ b/ohmpi/ohmpi.py
@@ -58,7 +58,7 @@ class OhmPi(object):
         settings : dict, optional
             Dictionnary of parameters. Possible parameters with their default values:
             `{'injection_duration': 0.2, 'nb_meas': 1, 'sequence_delay': 1,
-            'nb_stack': 1, 'sampling_interval': 2, 'tx_volt': 5, 'duty_cycle': 0.5,
+            'nb_stack': 1, 'sampling_interval': 2, 'vab': 5, 'duty_cycle': 0.5,
             'strategy': 'constant', 'export_path': None
         sequence : str, optional
             Path of the .csv or .txt file with A, B, M and N electrodes.
@@ -520,12 +520,12 @@ class OhmPi(object):
         self._hw._plot_readings(save_fig=save_fig, filename=filename)
 
     def run_measurement(self, quad=None, nb_stack=None, injection_duration=None, duty_cycle=None,
-                        autogain=True, strategy=None, tx_volt=None, best_tx_injtime=0.1,
+                        autogain=True, strategy=None, tx_volt=None, vab=None, best_tx_injtime=0.1,
                         cmd_id=None, vab_max=None, iab_max=None, vmn_max=None, vmn_min=None, **kwargs):
         # TODO: add sampling_interval -> impact on _hw.rx.sampling_rate (store the current value,
         #  change the _hw.rx.sampling_rate, do the measurement, reset the sampling_rate to the previous value)
         # TODO: default value of tx_volt and other parameters set to None should be given in config.py and used
-        #  in function definition
+        #  in function definition -> (GB) default values are in self.settings.
         """Measures on a quadrupole and returns a dictionnary with the transfer resistance.
 
         Parameters
@@ -541,15 +541,15 @@ class OhmPi(object):
         duty_cycle : float, optional
             Duty cycle (default=0.5) of injection square wave.
         strategy : str, optional, default: constant
-            Define injection strategy (if power is adjustable, otherwise constant tx_volt, generally 12V battery is used).
+            Define injection strategy (if power is adjustable, otherwise constant vab, generally 12V battery is used).
             Either:
             - vmax : compute Vab to reach a maximum Vmn_max and Iab without exceeding vab_max
             - vmin : compute Vab to reach at least Vmn_min
-            - constant : apply given Vab (tx_volt) but checks if expected readings not out-of-range
-            - full_constant: apply given Vab (tx_volt) with no out-of-range checks for optimising duration at the risk of out-of-range readings
+            - constant : apply given Vab but checks if expected readings not out-of-range
+            - full_constant: apply given Vab with no out-of-range checks for optimising duration at the risk of out-of-range readings
             Safety check (i.e. short voltage pulses) performed prior to injection to ensure
             injection within bounds defined in vab_max, iab_max, vmn_max or vmn_min. This can adapt Vab.
-            To bypass safety check before injection, tx_volt should be set equal to vab_max (not recpommanded)
+            To bypass safety check before injection, vab should be set equal to vab_max (not recpommanded)
         vab_max : str, optional
             Maximum injection voltage.
             Default value set by config or boards specs
@@ -562,7 +562,9 @@ class OhmPi(object):
         vmn_min :
             Minimum Vmn desired (used in strategy vmin).
             Default value set by config or boards specs
-        tx_volt : float, optional  # TODO: change tx_volt to Vab
+        tx_volt : float, optional  # deprecated
+            For power adjustable only. If specified, voltage will be imposed.
+        vab : float, optional
             For power adjustable only. If specified, voltage will be imposed.
         cmd_id : str, optional
             Unique command identifier.
@@ -587,6 +589,11 @@ class OhmPi(object):
             duty_cycle = self.settings['duty_cycle']
         if tx_volt is None and 'tx_volt' in self.settings:
             tx_volt = self.settings['tx_volt']
+        if vab is None and 'vab' in self.settings:
+            vab = self.settings['vab']
+        if vab is None and tx_volt is not None:
+            warnings.warn('"tx_volt" argument is deprecated and will be removed in future version. Use "vab" instead to set the transmitter voltage in volts.', DeprecationWarning)
+            vab = tx_volt
         if strategy is None and 'strategy' in self.settings:
             strategy = self.settings['strategy']
         if vab_max is None and 'vab_max' in self.settings:
@@ -612,7 +619,7 @@ class OhmPi(object):
         switch_pwr_on.join()
         status = q.get()
         if status:
-            vab = self._hw.compute_tx_volt(tx_volt=tx_volt, strategy=strategy, vmn_max=vmn_max, vab_max=vab_max,
+            vab = self._hw.compute_vab(vab=vab, strategy=strategy, vmn_max=vmn_max, vab_max=vab_max,
                                                iab_max=iab_max, vmn_min=vmn_min)
             # time.sleep(0.5)  # to wait for pwr discharge
             self._hw.vab_square_wave(vab, cycle_duration=injection_duration*2/duty_cycle, cycles=nb_stack, duty_cycle=duty_cycle)
@@ -673,7 +680,7 @@ class OhmPi(object):
 
             # if strategy not constant, then switch dps off (button) in case following measurement within sequence
             # TODO: check if this is the right strategy to handle DPS pwr state on/off after measurement
-            if (strategy == 'vmax' or strategy == 'vmin') and vab - tx_volt > 5.:  # if starting tx_volt was too far (> 5 V) from actual vab, then turn pwr off
+            if (strategy == 'vmax' or strategy == 'vmin') and vab - vab > 5.:  # if starting vab was too far (> 5 V) from actual vab, then turn pwr off
                 self._hw.tx.pwr.pwr_state = 'off'
 
                 # Discharge DPS capa
@@ -889,7 +896,7 @@ class OhmPi(object):
     # TODO: we could build a smarter RS-Check by selecting adjacent electrodes based on their locations and try to
     #  isolate electrodes that are responsible for high resistances (ex: AB high, AC low, BC high
     #  -> might be a problem at B (cf what we did with WofE)
-    def rs_check(self, tx_volt=5.0, cmd_id=None, couple=None):
+    def rs_check(self, vab=5, cmd_id=None, couple=None, tx_volt=None):
         # TODO: add a default value for rs-check in config.py import it in ohmpi.py and add it in rs_check definition
         """Checks contact resistances.
         Strategy: we just open A and B, measure the current and using vAB set or
@@ -897,12 +904,20 @@ class OhmPi(object):
 
         Parameters
         ----------
-        tx_volt : float
+        vab : float, optional
             Voltage of the injection.
         couple  : array, for selecting a couple of electrode for checking resistance
         cmd_id : str, optional
             Unique command identifier.
+        tx_volt : float, optional DEPRECATED
+            Save as vab.
         """
+        # check arguments
+        if tx_volt is not None:
+            warnings.warn('"tx_volt" is deprecated and will be removed in future version. Please use "vab" instead.',
+                DeprecationWarning)
+            vab = tx_volt
+
         # check pwr is on, if not, let's turn it on
         switch_tx_pwr_off = False
         if self._hw.pwr_state == 'off':
@@ -947,7 +962,7 @@ class OhmPi(object):
         for i in range(0, quads.shape[0]):
             quad = quads[i, :]  # quadrupole
             self._hw.switch_mux(electrodes=list(quads[i, :2]), roles=['A', 'B'], state='on')
-            self._hw._vab_pulse(duration=0.2, vab=tx_volt)
+            self._hw._vab_pulse(duration=0.2, vab=vab)
             current = self._hw.readings[-1, 3]
             vab = self._hw.tx.pwr.voltage
             print(vab, current)
@@ -1106,7 +1121,7 @@ class OhmPi(object):
                 self.exec_logger.debug('Acquisition parameters updated: ' + str(self.settings))
                 self.status = 'idle (acquisition updated)'
             except Exception as e:  # noqa
-                self.exec_logger.warning('Unable to update settings.')
+                self.exec_logger.warning('Unable to update settings. Error: ' + str(e))
                 self.status = 'idle (unable to update settings)'
         else:
             self.exec_logger.warning('Settings are missing...')
diff --git a/settings/default.json b/settings/default.json
index a0178639f1a9f15c93c2345546aabf3cba6f526f..d69f189e60ba297da69d245b02ecdfec0d62b386 100644
--- a/settings/default.json
+++ b/settings/default.json
@@ -4,7 +4,7 @@
     "sequence_delay": 1,
     "nb_stack": 1,
     "sampling_interval": 2,
-    "tx_volt": 5,
+    "vab": 5,
     "duty_cycle": 0.5,
     "strategy": "constant",
     "fw_in_csv": true,