Improves test_ohmpi_card_3_15.py

hardware/mb_2024_rev_0_0.py

@@ -257,7 +257,7 @@ class Rx(RxAbstract):
         gain_0 = _gain_auto(AnalogIn(self._ads_voltage, ads.P0))
         gain_2 = _gain_auto(AnalogIn(self._ads_voltage, ads.P2))
         gain = np.min([gain_0, gain_2])
-        self.exec_logger.debug(f'Setting TX ADC gain automatically to {gain}')
+        self.exec_logger.debug(f'Setting RX ADC gain automatically to {gain}')
         self.adc_gain = gain
 
     @property

hardware/ohmpi_card_3_15.py

@@ -226,7 +226,7 @@ class Rx(RxAbstract):
         gain_0 = _gain_auto(AnalogIn(self._ads_voltage, ads.P0))
         gain_2 = _gain_auto(AnalogIn(self._ads_voltage, ads.P2))
         gain = np.min([gain_0, gain_2])
-        self.exec_logger.debug(f'Setting TX ADC gain automatically to {gain}')
+        self.exec_logger.debug(f'Setting RX ADC gain automatically to {gain}')
         self.adc_gain = gain
 
     @property

test_ohmpi_card_3_15.py

@@ -3,6 +3,7 @@
 from OhmPi.hardware.ohmpi_card_3_15 import Tx
 from OhmPi.hardware.ohmpi_card_3_15 import Rx
 from OhmPi.logging_setup import create_stdout_logger
+import numpy as np
 
 exec_logger = create_stdout_logger(name='exec')
 soh_logger = create_stdout_logger(name='soh')
@@ -14,3 +15,16 @@ rx = Rx(exec_logger= exec_logger, soh_logger= soh_logger)
 
 print(f'TX current: {tx.current:.3f} mA')
 print(f'RX voltage: {rx.voltage:.3f} mV')
+
+tx.polarity = 1
+tx.inject(state='on')
+tx.adc_gain_auto()
+rx.adc_gain_auto()
+r = []
+for i in range(30):
+    r.append(rx.voltage/tx.current)
+    print(f'Resistance: {r[-1]:.3f}')
+r = np.array(r)
+print(f'Mean resistance: {np.mean(r):.3f} Ohms')
+print(f'Resistance std: {np.std(r):.3f} Ohms')
+print(f'Dev. {100. * np.std(r)/np.mean(r):.1} %')