Add OhmPi.set_time() in case RPI running in AP mode without internet

.dev/test_mb_2024_2_mux_2024.py

 import matplotlib
 matplotlib.use('TkAgg')
 from ohmpi.utils import change_config
-change_config('../configs/config_mb_2024_0_2__2_mux_2024_dph5005.py', verbose=False)
+#change_config('../configs/config_mb_2024_0_2__2_mux_2024_dph5005.py', verbose=False)
 import importlib
 import time
 import logging
 from ohmpi.config import HARDWARE_CONFIG
+import numpy as np
 
 stand_alone = False
-part_of_hardware_system = True
-within_ohmpi = False
+part_of_hardware_system = False
+within_ohmpi = True
 
 # Stand alone
 if stand_alone:
@@ -99,18 +100,19 @@ if within_ohmpi:
     # k._hw.rx._bias = -1.38
     # print(f'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()
-    A, B, M, N = (1, 4, 2, 3)
-    # k._hw.switch_mux([A, B, M, N], state='on')
+    abmn = np.array([1, 4, 2, 3]) + 0
+    k.switch_mux_on(abmn)
     # k._hw.vab_square_wave(12., cycle_duration=10., cycles=3)
     # k._hw.switch_mux([A, B, M, N], state='off')
     # 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()
     print('using OhmPi')
-    d = k.run_measurement([A, B, M, N], injection_duration=1., nb_stack=2, duty_cycle=0.5)
+    d = k.run_measurement(abmn, injection_duration=0.5, nb_stack=2, duty_cycle=0.5)
+    k.switch_mux_off(abmn)
     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')
-    print(f'OhmPi: Resistance: {d["R [ohm]"] :.2f} ohm, dev. {d["R_std [%]"]:.2f} %, rx bias: {k._hw.rx._bias:.2f} mV')
+    print(f'OhmPi: Resistance: {d["R [Ohm]"] :.2f} ohm, dev. {d["R_std [%]"]:.2f} %, rx bias: {k._hw.rx._bias:.2f} mV')
     k._hw._plot_readings(save_fig=False)
     # plot_exec_log('ohmpi/logs/exec.log')
-change_config('../configs/config_default.py', verbose=False)
+#change_config('../configs/config_default.py', verbose=False)

index.html

@@ -81,6 +81,7 @@ mosquitto_sub -h raspberrypi.local -t ohmpi_0001/ctrl
         
         <button id="restartBtn" type="button" class="btn btn-danger">Restart</button>
         <button id="shutdownBtn" type="button" class="btn btn-danger">Shutdown</button>
+        <button id="setTimeBtn" type="button", class="btn btn-secondary">Set Time</button>
 
         <!-- Modal for configuration -->
         <div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
@@ -903,6 +904,17 @@ mosquitto_sub -h raspberrypi.local -t ohmpi_0001/ctrl
         }
         let restartBtn = document.getElementById('restartBtn')
         restartBtn.addEventListener('click', restartBtnFunc)
+
+        // set time
+        function setTimeBtnFunc() {
+            d = new Date()
+            sendCommand('{"cmd": "set_time", "kwargs": {"date": "' + d.toISOString() + '"}}',
+             function(x) {
+                console.log('time set')
+            })
+        }
+        let setTimeBtn = document.getElementById('setTimeBtn')
+        setTimeBtn.addEventListener('click', setTimeBtnFunc)
         
         // download data
         function downloadBtnFunc() {

ohmpi/ohmpi.py

@@ -563,6 +563,19 @@ class OhmPi(object):
         self.exec_logger.info(f'Restarting pi following command {cmd_id}...')
         os.system('poweroff')  # this may require admin rights
 
+    def set_time(self, date, cmd_id=None):
+        """Set date of the RPI remotely.
+
+        Parameters
+        ----------
+        date : str
+            ISO datetime string such as 2024-07-23T20:00:01.345Z.
+        cmd_id : str, optional
+            Unique command identifier.
+        """
+        os.system('date --set ' +  date)
+        self.exec_logger.info(f'New time set following command {cmd_id}...')
+
     def plot_last_fw(self, save_fig=False, filename=None):
         """Plots last full waveform measurement