Hello, everybody!
I want to use mqtt to send audio and play it on another esp32, but the received audio is very noisy and the tone becomes baby sounds.
send code：
microphone:
- platform: i2s_audio
id: external_mic
adc_type: external
pdm: false
i2s_audio_id: i2s_in
i2s_din_pin: GPIO33 #SD
bits_per_sample: 32bit
use_apll: false
sample_rate: 16000
channel: right
on_data:
- lambda: |-
for (uint16_t byte : x) {
id(audio_buffer).push_back(byte);
}
if(id(audio_buffer).size() >= 256){
id(mqtt_client).publish_json("call/message", [=](JsonObject root) {
root["key"] = "audio";
JsonArray audio_data = root.createNestedArray("data");
for (size_t i = 0; i < id(audio_buffer).size(); i++) {
uint8_t value = static_cast<uint8_t>(id(audio_buffer)[i] >>8);
audio_data.add(value);
}
});
id(audio_buffer).clear();
}
receive code:
speaker:
- platform: i2s_audio
i2s_audio_id: i2s_out
dac_type: external
i2s_dout_pin: GPIO13
mode: mono
id: speaker_audio
mqtt:
broker: 192.168.6.8
discovery: False
reboot_timeout: 0s
id: mqtt_client
on_json_message:
topic: call/message
then:
- lambda: |-
if (x.containsKey("key") && x["key"] == "audio" && x.containsKey("data")) {
std::vector<uint8_t> speaker_buffer;
for (size_t i = 0; i < x["data"].size(); i++) {
uint8_t value = x["data"][i];
speaker_buffer.push_back(value);
}
id(speaker_audio).play(speaker_buffer.data(),speaker_buffer.size());
speaker_buffer.clear();
}