<![CDATA[Topics tagged with battery]]>https://www.community.lilygo.cc/tags/batteryRSS for NodeMon, 15 Jun 2026 17:03:23 GMTMon, 29 Jul 2024 09:20:52 GMT60<![CDATA[TTGO Lora OLED V1.6.1 Battery Monitor]]>Hi,
I have the TTGO Oled Lora board version 1.6.1 looking at the schematics it looks like this board has a voltage divider for battery level monitoring but I can seem to find which pin it goes to as there seems to be a few schematics I can find but none specifically reference v1.6.1. I think it might be running to pin 26? I thought there might have been a example battery monitor script available somewhere but I cant find one?
Thanks

]]>https://www.community.lilygo.cc/topic/1133/ttgo-lora-oled-v1-6-1-battery-monitorhttps://www.community.lilygo.cc/topic/1133/ttgo-lora-oled-v1-6-1-battery-monitorMon, 29 Jul 2024 09:20:52 GMT<![CDATA[Determine power source on TTGO T7 v1.5]]>Thanks for that info.

For anyone else that stumbles across this in the future: what I ended up doing was setting up a simple voltage divider (https://randomnerdtutorials.com/how-to-level-shift-5v-to-3-3v/) and connecting the 3.3V output as an input to one of the GPIO pins, set to pull down.

When the TTGO board is running on battery, the 5V pin I'm using for input from the external power supply becomes a 5V output, which backfeeds into the 5V rail I'm using to detect external power. To solve this, I put a diode between the external power rail and the 5V pin on the TTGO board. This does result in some voltage loss when operating on external power, so I've been advised to use a Schottky diode instead, but I haven't tried that yet.

So far, so good!

]]>https://www.community.lilygo.cc/topic/491/determine-power-source-on-ttgo-t7-v1-5https://www.community.lilygo.cc/topic/491/determine-power-source-on-ttgo-t7-v1-5Sun, 06 Aug 2023 20:34:36 GMT