Search found 3 matches

by Jinu Vijayan
Thu Jun 23, 2022 6:12 am
Forum: ESP32 Arduino
Topic: ESP32 Pico V3 I/O expander
Replies: 5
Views: 4448

Re: ESP32 Pico V3 I/O expander

ESP_Sprite wrote:
Tue Jun 21, 2022 9:45 am
Those internal pull-ups are 50K or so, which is way too high for I2C. Suggest you add external pull-ups; something like 2K7 should work.
I did that but the problem still persists.
by Jinu Vijayan
Tue Jun 21, 2022 9:12 am
Forum: ESP32 Arduino
Topic: ESP32 Pico V3 I/O expander
Replies: 5
Views: 4448

Re: ESP32 Pico V3 I/O expander

If the WireScan example https://github.com/espressif/arduino-esp32/tree/master/libraries/Wire/examples/WireScan doesn't show you an address, then you have an electrical problem. I don't have time to explain how I2C works, but I'll bet google does. You probably need some pullup resistors. I used an ...
by Jinu Vijayan
Mon Jun 20, 2022 5:20 am
Forum: ESP32 Arduino
Topic: ESP32 Pico V3 I/O expander
Replies: 5
Views: 4448

ESP32 Pico V3 I/O expander

Hello, I am a student and I am trying to use tca6424a with a ESP32 PICO V3. When I upload the code for the interface and the code gets executed up to the test connection command after that it is not working the code I am using is attached below. I wrote the code in vscode using platformio. #include ...