Can it transmit data from the ESP32?

[DurandA]

Can the SOCORAD32 transmit data from the ESP32 or is the ESP32 only for the control of the transmission? Can the ESP32 be used to generate DTMF tones?

[MordFIdel]

Yes it can transmit data from the ESP32. About DTMF, we've are yet to try DTMF, we are not sure.

[DurandA]

I think from the pictures you are using a SA818 module which doesn't have any digital audio input. Do you feed the MIC input from the ESP DAC? Do you use a discrete chip like I2S->analog?

Also, when do you plan to start the Crowd Supply campaign? Your product sounds awesome.

[MordFIdel]

I know SA818. The module I am using is slightly different. It houses it's own audio subsystem. The audio is not processed via ESP32. Although it is also a great idea to do that via DAC. The ESP32 only for controls and data transmission.

[joyel24]

In my opinion, DAC from esp32 to the rf module is a feature that it must include. It can be very useful to implement new data transmission protocols. ADC would also be very nice as it becomes possible to decode things directly from the ESP32. A relatively simple circuit implementation but with a huge possible benefits in the end !

[MordFIdel]

Yes, these are good ideas. For example, the DAC will enable direct audio transmission from a mobile phone for example. Mobile phone audio→Bluetooth→ESP32→DAC→RF module

I will look into this.

[joyel24]

Yes, these are good ideas. For example, the DAC will enable direct audio transmission from a mobile phone for example. Mobile phone audio→Bluetooth→ESP32→DAC→RF module

I will look into this.

Encoding/decoding can also be added into the esp32 firmware I guess.

[MordFIdel]

Yeah

[lyusupov]

1. https://github.com/nakhonthai/ESP32IGate
2. https://github.com/erstec/APRS-ESP