Nrf52832 Communication with ESP8266 over i2c.

[Vaibhav_Bansal]

Hi 

I am trying to implement the communication between nrf52832 dk and nodemcu esp8266 over i2c.

My i2c code in nodemcu is working fine as I had tested the communication between two node mcu, now I am trying to implement the communication between nrf and esp.

I had tried the i2c scanner example but all the time it shows no device found. If needed I can share my nodemcu code here.

Thanks

Vaibhav

[awneil]

So which one is the Master, and which one is the Slave?

Show a schematic of your connection between the 2 boards.

Are you sure you have (correct) pullups?

Have you used an Oscilloscope or analyser to see what's happening on the lines?

[Vaibhav_Bansal]

1. NRF is Mater and ESP is slave.

2. Schematic I can't share but give a brief here.

2.1 SCL _nrf to SCL_ esp.

2.2 SDA _nrf to SDA_ esp

2.3 GND.

2.4 10K pullup upto 3.3 V.

3. Yes I think I did.

4. No I don't have any.

[awneil]

10k might be a bit high ...

An oscilloscope really is an indispensable piece of equipment for this stuff!

[Vaibhav_Bansal]

I know but currently I don't have it.

[awneil]

So you're blind, then!

You'll just have to play by trial and error.

Try smaller pullups.

Can your nRF Master see any other Slaves?

If you make the nRF Slave, and ESP Master - can the ESP see the nRF ?

[Vaibhav_Bansal]

I am working on this approach.

[Vaibhav_Bansal]

nrf is able to detect other peripherals but can't able to detect the nodemcu.

[awneil]

So think about what that tells you ...

[Vaibhav_Bansal]

actually the issue is on ESP side. ESP doesn't support slave configurations. I am looking for solution on esp forum thanks.

[awneil]

Vaibhav_Bansal said:

ESP doesn't support slave configurations

So how did this ever work:

Vaibhav_Bansal said:

My i2c code in nodemcu is working fine as I had tested the communication between two node mcu

Anyhow, as it's not a Nordic issue, you mark your answer as the solution: