Help for first project with Beetle ESP32-C3 + touchscreen + other sensors
Raphael38000 2025-08-29 14:09:35 202 Views1 Replies Hi,
I have a project in which I would like to connect to https://www.dfrobot.com/product-2566.html :
- This screen (using FPC) : https://wiki.dfrobot.com/3.5inches_480_320_TFT_LCD_Capacitive_Touchscreen_SKU_DFR0669 - Accelerometer + Magnetometer via I2C - Battery voltage check via analog input (using 2 resistor to divide tension)
My question(s) :
- Using the expansion board, which pins does SDA and SCL on expansion board uses ? 8/9 or 21/22? (Because FPC maps SDA/SCL on 21/22…)
- Will it work to connect Accelerometer + Magnetometer on SDA/SCL expansion board?
- Which Pin can I use for analog read for my battery voltage check?
Thank you very much!
Raphael
Just found out, by looking at the plate diagram, that plate expansion board connects SDA/SCL and FPC SDA/SDL to pins 8 and 9
So that answers my first question!
Still remaining questions :
- Will it work to connect Accelerometer + Magnetometer on SDA/SCL expansion board?
==> I guess that will work because they have different adresses
- Which Pin can I use for analog read for my battery voltage check?
Raphael38000 
