Get battery level

Q&A Forum › Category: ESP8266 › Get battery level

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Hugo Articardi Calabrese asked 6 years ago

Hi Roi, hope you are fine.
Do you know haow to get battery level measure ???
Thanks in advance… best regards. Hugo.

4 Answers

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Sara Santos Staff answered 6 years ago

Hi Hugo.
We have a project with LoRa in the ESP32 course that gets battery level.
You can take a look at that project here: https://rntlab.com/module-11/esp32-lora-sender-solar-powered-part-4/
You can also see our resources about that project here: https://github.com/RuiSantosdotme/ESP32-Course/tree/master/code/LoRa_Project/LoRa_Sender
I hope this helps with your project.
Regards,
Sara 🙂

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Hugo Articardi Calabrese answered 6 years ago

Thank you Sara for your help.
Best Regards. Hugo.

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Brian Webb answered 6 years ago

If we wanted to get the battery leval as a voltage value rather than a % what should we do?

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Sara Santos Staff answered 6 years ago

In line 133 of the code https://github.com/RuiSantosdotme/ESP32-Course/blob/master/code/LoRa_Project/LoRa_Sender/LoRa_Sender.ino you should use something as follows:

batteryLevel = map(analogRead(batteryPin), 0.0f, 4095.0f, 0, 3.3);

Instead of mapping to a range of 0 to 100, you use a range of 0 to 3.3V
I haven’t tested this, but I think it should work. However, I don’t know if it will be very accurate.

Regards,
Sara