FireBeetle ESP32 v4.0 board using a 3.7V LiPo battery not working
Jean.Gul 2024-03-07 20:37:00 182 Views3 Replies hello,
When I attempt to power my FireBeetle ESP32 v4.0 board using a 3.7V LiPo battery, it does not seem to work. The battery is in good condition, with a voltage of 3.95V, and it works fine with my ESP32 Heltect board.
I have ensured that I am connecting the battery to battery port and not the VCC port.
I would appreciate any assistance or guidance you can provide to help resolve this issue. Thank you for your time and support.
Best regards,
JeanG
Thank You for your response. The polarity was not OK, now it works.
I have read that there seems to be an inconsistency between the schematic (https://raw.githubusercontent.com/DFRobot/Wiki/master/DFR0478/%5BDFR0478%5DFireBeetle%20Board-ESP32(V4.0)%E7%94%9F%E4%BA%A7%E6%A3%80%E6%9F%A5%E5%9B%BE.PDF) and the actual board. Some users report that 0 Ohm resistors R10 and R11 (needed for the voltage divider) are missing on the board for voltage read at A0 pin.
Should I bridge the gaps where R11 and R10 should be? Could you please explain why these resistors are not included? Also, if I were to add 0 Ohm resistors at the R10 and R11 positions, would that lead to any inconsistencies with the board (impact on low power consumption in deep sleep) ?
I have bought this boards for their low power consumption in ESP32 deep sleep.
Jean.Gul Are the batteries in the correct polarity?
And how did you determine that the ESP32 wasn't activated, because the FireBeetle ESP32 doesn't turn on the LEDs when on battery power to save power.
Can you attach an external LED and write code to try?
If you have a multimeter, you can also measure if there is voltage between 3V3/GND of the FireBeetle when the battery is inserted.
Yeez_B Thank You for your response. The polarity was not OK, now it works.
I have read that there seems to be an inconsistency between the schematic (https://raw.githubusercontent.com/DFRobot/Wiki/master/DFR0478/%5BDFR0478%5DFireBeetle%20Board-ESP32(V4.0)%E7%94%9F%E4%BA%A7%E6%A3%80%E6%9F%A5%E5%9B%BE.PDF) and the actual board. Some users report that 0 Ohm resistors R10 and R11 (needed for the voltage divider) are missing on the board for voltage read at A0 pin.
Should I bridge the gaps where R11 and R10 should be? Could you please explain why these resistors are not included? Also, if I were to add 0 Ohm resistors at the R10 and R11 positions, would that lead to any inconsistencies with the board (impact on low power consumption in deep sleep) ?
I have bought this boards for their low power consumption in ESP32 deep sleep. 
