FIREBEETLE ESP32 - Serial port and I2S issues
Piero76 2021-03-26 19:07:54 1709 Views2 Replies Hello everyone,
I have a Firebeetle ESP32 and I am trying to use the device with Arduino IDE to receive audio from 2 microphones.
Specifically I am using the MAX9867 codec (with its EVKIT) which should communicate in I2S with esp32.
For the initial setup I followed this tutorial:
https://wiki.dfrobot.com/FireBeetle_ESP ... 8#target_6
For the I2s example I referred to this tutorial (I should see the data viewable in the Arduino IDE serial plotter):
https://diyi0t.com/i2s-sound-tutorial-for-esp32/
However, the problems I encountered are these:
1) The serial monitor does not work from USB: I can program the device, even if 5 times out of 10 the device goes into error (if I connect to the UART TX with another uart to USB bridge, on another COM, I can read the data).
I've tried with this simple code to test the usb serial, but I can't see anything on the usb serial port:
If I connect a logic analyzer to the pins out of the codec I see the packets.
In the documentation I read, I could not understand the I2S pinout.
In the DFrobot () site image it should look like this:
BCLK = 14,
LRCLK = 17,
DO = 4
DI = 6
From Examples of ESPRESSIF (https://docs.espressif.com/projects/esp ... s/i2s.html)
BCLK = 26,
LRCLK = 25,
DO = 22
DI = not indicated
I need help
Thanks for all information
I have a Firebeetle ESP32 and I am trying to use the device with Arduino IDE to receive audio from 2 microphones.
Specifically I am using the MAX9867 codec (with its EVKIT) which should communicate in I2S with esp32.
For the initial setup I followed this tutorial:
https://wiki.dfrobot.com/FireBeetle_ESP ... 8#target_6
For the I2s example I referred to this tutorial (I should see the data viewable in the Arduino IDE serial plotter):
https://diyi0t.com/i2s-sound-tutorial-for-esp32/
However, the problems I encountered are these:
1) The serial monitor does not work from USB: I can program the device, even if 5 times out of 10 the device goes into error (if I connect to the UART TX with another uart to USB bridge, on another COM, I can read the data).
I've tried with this simple code to test the usb serial, but I can't see anything on the usb serial port:
Code: Select all
2) From the UART I read from, I can't see any data coming from the I2S.void setup() {
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
Serial.begin(115200);
digitalWrite(LED_BUILTIN, LOW); // turn the LED on (HIGH is the voltage level)
}
void loop() {
static unsigned long i = 0;
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
delay(2000);
Serial.println("Hello");
Serial.println(i++);
//delay(1000);
digitalWrite(LED_BUILTIN, LOW); // turn the LED on (HIGH is the voltage level)
delay(2000);
}If I connect a logic analyzer to the pins out of the codec I see the packets.
In the documentation I read, I could not understand the I2S pinout.
In the DFrobot () site image it should look like this:
BCLK = 14,
LRCLK = 17,
DO = 4
DI = 6
From Examples of ESPRESSIF (https://docs.espressif.com/projects/esp ... s/i2s.html)
BCLK = 26,
LRCLK = 25,
DO = 22
DI = not indicated
I need help
Thanks for all information
2021-03-29 16:23:58 Hi,
thank you for the answer,
The D0 and D1 Pins aren't connected and I can't see anything on the USB COM port with Arduino IDE Serial Monitor ( I try to use Tera Term and the same thing happens).
If I connect an UART to USB device to the D1 pin, I can see the text in the firmware on the new device com port. Piero76
thank you for the answer,
The D0 and D1 Pins aren't connected and I can't see anything on the USB COM port with Arduino IDE Serial Monitor ( I try to use Tera Term and the same thing happens).
If I connect an UART to USB device to the D1 pin, I can see the text in the firmware on the new device com port.
Piero76 2021-03-28 10:14:02 I think you occupy pins D0 and D1. These two pins are the serial ports of ESP32. If you do not use these two pins, I hope you can provide photos or diagrams of the connection to find other reasons. 347945801
347945801 