Hello, I’m trying to power a XIAO nRF52840 & Wio-SX1262 Kit with a 18650 battery.
I soldered hookup wire onto the battery pads on the PCB and a battery holder.
My multi-meter shows no shorts between the soldered pads on the nRF52840.
I double checked positive on the nRF52840 connects to positive on the battery and same with negative.
The battery is putting out 4.11V, 4.5μA
I’m able to power it on and flash over USB cable but I can’t get it to keep running on battery.
Is there anything else I can try to get this running? I’ll admit I’m very much a newbie to diy electronics.
Hi there so you’ve run into a common problem that user’s face when they have a serial initialization in their code it’s waiting on the serial port…
remove or comment out the while Serial in your setup and it should resolve the problem
Hope that helps
GL
PJ
I’m just running the default Meshcore repeater firmware for the Xiao nRF52 WIO. I’ll try and throw together a “Hello World” firmware that makes the light flash or some thing to get the battery power sorted out before digging into the main Meshcore.
It was a firmware issue. I tested the MeshCore companion firmware and it worked fine. I switched back to the repeater one and it stopped working. I did a factory reset in the firmware USB setup console and reinstalled the repeater firmware. Now it’s working.
My guess is the factory reset did something? Anyway I’m happy it’s working without having to fork the main firmware. I’m off to build a bunch of $20 repeaters powered by solar garden light parts.
Hi there,
Excellent , You got it going..
It can be flaky, connections and a whole host of items.
They do Work Great When everything is set just right ,I will say that. 
Great breakdown too, I’m certain other will find it useful as well. Thanx for the contribush 
watching too many pizza video’s 
guess.
GL 
PJ