I have been using your great library for testing range of Ebyte E22 modules and it works perfectly.
I have following sketch which send sine wave data over ESPNow wireless link and playing it on other side via headphone connected to ESP32's internal DAC. It works fine.
Now I want to send same sine wave data using E22 modules (broadcast mode) instead of ESPNow for longer range.
#include <WiFi.h>
#include <esp_now.h>
#define lineIn ADC1_CHANNEL_0 // ADC 1 channel 0 GPIO36 for analog microphone connecttion
#define lineOut 25 // DAC pin for headphone or amplified speaker connection
#define touchThreshold 50 // TTT (Touch To Transmit) threshold
#define audioBytes 240 // ESPNow allow upto 250 bytes packets
uint8_t audioData[audioBytes] =
// Sin wave
{
0x80, 0x83, 0x87, 0x8A, 0x8E, 0x91, 0x95, 0x98, 0x9B, 0x9E, 0xA2, 0xA5, 0xA7, 0xAA, 0xAD, 0xAF,
0xB2, 0xB4, 0xB6, 0xB8, 0xB9, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF, 0xBF, 0xBF, 0xC0, 0xBF, 0xBF, 0xBF,
0xBE, 0xBD, 0xBC, 0xBB, 0xB9, 0xB8, 0xB6, 0xB4, 0xB2, 0xAF, 0xAD, 0xAA, 0xA7, 0xA5, 0xA2, 0x9E,
0x9B, 0x98, 0x95, 0x91, 0x8E, 0x8A, 0x87, 0x83, 0x80, 0x7C, 0x78, 0x75, 0x71, 0x6E, 0x6A, 0x67,
0x64, 0x61, 0x5D, 0x5A, 0x58, 0x55, 0x52, 0x50, 0x4D, 0x4B, 0x49, 0x47, 0x46, 0x44, 0x43, 0x42,
0x41, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x41, 0x42, 0x43, 0x44, 0x46, 0x47, 0x49, 0x4B,
0x4D, 0x50, 0x52, 0x55, 0x58, 0x5A, 0x5D, 0x61, 0x64, 0x67, 0x6A, 0x6E, 0x71, 0x75, 0x78, 0x7C
};
// REPLACE WITH YOUR RECEIVER MAC Address
uint8_t broadcastAddress[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
void OnDataRecv(const uint8_t * mac, const uint8_t *data, int len) {
uint8_t audioIn;
for (int i=0;i<len;i++) {
audioIn += (uint8_t)data[i];
dacWrite(lineOut, audioIn);
}
}
void setup() {
Serial.begin(115200);
while(!Serial){};
delay(500);
Serial.println();
// Set device as a Wi-Fi Station
WiFi.mode(WIFI_STA);
// Init ESP-NOW
if (esp_now_init() != ESP_OK) {
Serial.println("Error initializing ESP-NOW");
return;
}
esp_now_register_recv_cb(OnDataRecv);
// Register peer
esp_now_peer_info_t peerInfo;
memcpy(peerInfo.peer_addr, broadcastAddress, 6);
peerInfo.channel = 0;
peerInfo.encrypt = false;
// Add peer
if (esp_now_add_peer(&peerInfo) != ESP_OK){
Serial.println("Failed to add peer");
return;
}
Serial.println("Setup complete, move over to the Loop");
}
void loop() {
if (touchRead(12) < touchThreshold )
{
// Send audio packet via ESP-NOW
esp_err_t result = esp_now_send(broadcastAddress, (const uint8_t *) audioData, audioBytes);
}
} //End of Loop
Thanks.
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