It should work normally without any special configuration. The USB Vbus and battery connector share the same regulator. What code are you running with the WisBlock? Can you run a simple LED blinking?
If that is for all 4 unit, I am thinking that the voltage is not going to the module. Can you check the voltage on the header pins if you can detect any when you are using the external power source? It might be the wires/cable going to the module causing it?
If I place a volt meter across the two battery header pins (circled in the attached image) when connected to the power supply I can read the expected 4.2v
@carlrowan well it seems that the power draw is so small that the desktop power supply is just not registering. The flashing LED program clearly shows that all is in fact working fine β¦ I actually had to check the program we were using for testing the batteries and it seems that the pin had been wrongly defined.
Maybe itβs time we introduced an oscilloscope to monitor our power consumption.