I built a Meshtastic solar node with the WisMesh 1W Booster Starter Kit.
I have the following configuration:
12V Solar panel → CN3791 → 10000mAh Battery ->MT3608 Boost converter (5V) → RAK11302 power (jumper on external)
I am concerned that the battery status is not reported correct (after the boost converter, I have 5V, regardless of the battery voltage).
Is it possible and safe to make a connection from the battery to the 19007 base board as well to get better battery status?
I would have :
12V Solar panel → CN3791 → 10000mAh Battery ->MT3608 Boost converter (5V) → RAK11302 power (jumper on external)
->RAK19007
Please advise
You cannot make a connection from the RAK19007 battery connector to your battery, as that would mean that there would be two chargers (your CN3791 and WisBlocks charger) trying to charge the battery.
In any configuration with an external charger setup, the WisBlock cannot report the battery status.
The only thing that could work, but I don’t think that is supported by Meshtastic, would be to connect the battery voltage to WB_A1 pin on the pin headers TROUGH A RESISTOR DIVIDER TO BRING DOWN THE VOLTAGE TO 3.3V and setup the Meshtastic firmware to measure the battery through WB_A1 analog input.
No idea if that works or how to do it. Warranty void, if you burn down the WisBlock, we will not replace it.
I use one of the RAK Ina devices to measure voltage and current of the battery. If you route the positive wire through this, you can read voltage and current. Not perfect but it works with my meshtastic node quite well.
