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--- member-projects:m0jqq_-_bpq_for_beginners [2024/12/15 12:27] – [Monitoring a Remote Battery Voltage] m0jqq
+++ member-projects:m0jqq_-_bpq_for_beginners [2025/08/01 18:33] (current) – m0jqq
@@ Line 464: / Line 464: @@
 import serial
 import time
-sdata = serial.Serial('/dev/ttyUSB0', 115200, timeout=1.0)
+sdata = serial.Serial('/dev/serial/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.1:1.0-port0', 115200, timeout=1.0)
 time.sleep(2)
 sdata.reset_input_buffer()
@@ Line 472: / Line 472: @@
                 time.sleep(0.01)
                 if sdata.in_waiting >0:
-                        file = open("/opt/oarc/bpq/beacon" ,"w")
+                        file = open("/tmp/beacon" ,"w")
                         battState = sdata.readline().decode('utf-8').rstrip()
                         file.write(f"{battState}"+"\n")
@@ Line 484: / Line 484: @@
 </code>
 Make it executable <code> chmod +x battMonitor.py </code>
+== Create bash startup script – getBattMonitor.sh ==
+<code>
+nano getBattMonitor.sh
+#!/bin/bash
+sudo python3 /home/robin/battMonitor.py
+sleep 1
+</code>
+Make it executable <code> chmod +x getBattMonitor.sh </code>
+Now is the time to test your work. Connect a variable power supply set to less than 5 volts to the batt+ and Gnd connections of your Arduino and measure the voltage between GND & A0 It should be about one third of your variable power supply voltage.
+Start the script with <code> ~/getBattMonitor.sh </code> After a few seconds you should see something like the following...
+a <code> get /opt/oarc/bpq/beacon </code> from a second terminal should match and follow the output at 5 second intervals