Can not compile on Arduino Nano ESP 32

[ctodor]

Hi,
I'm trying to compile one of the example on Arduino Nano ESP32. (MySensors version 2.3.2)
Am I doing something wrong?

***Compiling debug version of 'SoilMoistSensor' for 'Arduino Nano ESP32 (nano_nora)'

esp32-hal-uart.c: In function uartSetPins

esp32-hal-uart.c: 153:9: warning: 'return' with no value, in function returning non-void
return
^~~~~~
esp32-hal-uart.c:149: note declared here
bool uartSetPins(uint8_t uart_num, int8_t rxPin, int8_t txPin, int8_t ctsPin, int8_t rtsPin)
^~~~~~~~~~~

mysensors.h:61: In file included from
SoilMoistSensor.ino:73: from

MyHwESP32.cpp: In function bool hwInit()

MyHwESP32.cpp: 30:48: error: no matching function for call to 'USBCDC::begin(long unsigned int, SerialConfig)
MY_SERIALDEVICE.begin(MY_BAUD_RATE, SERIAL_8N1)

USB.h:21: In file included from
HardwareSerial.h:201: from
arduino.h:184: from
SoilMoistSensor.ino: from
USBCDC.h:70: note candidate void USBCDC begin(long unsigned int)
void begin(unsigned long baud=0)
^~~~~
USBCDC.h:70: note candidate expects 1 argument, 2 provided

SoilMoistSensor.ino: In function void loop()

SoilMoistSensor.ino: 143:17: error: call of overloaded 'sleep(uint32_t&)' is ambiguous
sleep(SLEEP_TIME)

unistd.h:23: In file included from
unistd.h:4: from
pthread.h:25: from
pthread.h:21: from
gthr-default.h:48: from
gthr.h:151: from
atomicity.h:35: from
basic_string.h:39: from
string:52: from
stdexcept:39: from
array:39: from
tuple:39: from
functional:54: from
Error compiling project sources
HardwareSerial.h:49: from
arduino.h:184: from
Debug build failed for project 'SoilMoistSensor'
SoilMoistSensor.ino: from***

[eiten]

@ctodor said in Can not compile on Arduino Nano ESP 32:

USBCDC

Can you please attach your sketch?

[ctodor]

@eiten
It is the SoilMoistSensor.ino skecth from MySensor example.

*// Enable debug prints to serial monitor
#define MY_DEBUG
//#define MY_GATEWAY_ESP32

// Enable and select radio type attached
//#define MY_RADIO_RF24
//#define MY_RADIO_NRF5_ESB
#define MY_RADIO_RFM69
//#define MY_RADIO_RFM95

#include <math.h> // Conversion equation from resistance to %
#include <MySensors.h>

// Setting up format for reading 3 soil sensors
#define NUM_READS (int)10 // Number of sensor reads for filtering
#define CHILD_ID 0

MyMessage msg(CHILD_ID, V_LEVEL);
uint32_t SLEEP_TIME = 30000; // Sleep time between reads (in milliseconds)

long buffer[NUM_READS];
int idx;

/// @brief Structure to be used in percentage and resistance values matrix to be filtered (have to be in pairs)
typedef struct {
int moisture; //!< Moisture
long resistance; //!< Resistance
} values;

const long knownResistor = 4700; // Constant value of known resistor in Ohms

int supplyVoltage; // Measured supply voltage
int sensorVoltage; // Measured sensor voltage

values valueOf[NUM_READS]; // Calculated moisture percentages and resistances to be sorted and filtered

int i; // Simple index variable

void setup()
{
// initialize the digital pins as an output.
// Pin 6,7 is for sensor 1
// initialize the digital pin as an output.
// Pin 6 is sense resistor voltage supply 1
pinMode(6, OUTPUT);

// initialize the digital pin as an output.
// Pin 7 is sense resistor voltage supply 2
pinMode(7, OUTPUT);

}

void presentation()
{
sendSketchInfo("Soil Moisture Sensor Reverse Polarity", "1.0");
present(CHILD_ID, S_MOISTURE);
}

void loop()
{

measure(6,7,1);
Serial.print ("\t");
Serial.println (average());
long read1 = average();

measure(7,6,0);
Serial.print ("\t");
Serial.println (average());
long read2= average();

long sensor1 = (read1 + read2)/2;

Serial.print ("resistance bias =" );
Serial.println (read1-read2);
Serial.print ("sensor bias compensated value = ");
Serial.println (sensor1);
Serial.println ();

//send back the values
send(msg.set((int32_t)ceil(sensor1)));
// delay until next measurement (msec)
sleep(SLEEP_TIME);

}

void measure (int phase_b, int phase_a, int analog_input)
{
// read sensor, filter, and calculate resistance value
// Noise filter: median filter

for (i=0; i<NUM_READS; i++) {

	// Read 1 pair of voltage values
	digitalWrite(phase_a, HIGH);                 // set the voltage supply on
	delayMicroseconds(25);
	supplyVoltage = analogRead(analog_input);   // read the supply voltage
	delayMicroseconds(25);
	digitalWrite(phase_a, LOW);                  // set the voltage supply off
	delay(1);

	digitalWrite(phase_b, HIGH);                 // set the voltage supply on
	delayMicroseconds(25);
	sensorVoltage = analogRead(analog_input);   // read the sensor voltage
	delayMicroseconds(25);
	digitalWrite(phase_b, LOW);                  // set the voltage supply off

	// Calculate resistance
	// the 0.5 add-term is used to round to the nearest integer
	// Tip: no need to transform 0-1023 voltage value to 0-5 range, due to following fraction
	long resistance = (knownResistor * (supplyVoltage - sensorVoltage ) / sensorVoltage) ;

	delay(1);
	addReading(resistance);
	Serial.print (resistance);
	Serial.print ("\t");
}

}

// Averaging algorithm
void addReading(long resistance)
{
buffer[idx] = resistance;
idx++;
if (idx >= NUM_READS) {
idx = 0;
}
}

long average()
{
long sum = 0;
for (int cnt = 0; cnt < NUM_READS; cnt++) {
sum += buffer[cnt];
}
return (long)(sum / NUM_READS);
}*

[eiten]

Your board seems to use USBCDC to communicate with the PC. So in the file /hal/architecture/ESP32/MyHwESP32.cpp, line 30, you have to change MY_SERIALDEVICE.begin(MY_BAUD_RATE, SERIAL_8N1); to MY_SERIALDEVICE.begin(MY_BAUD_RATE);.
Furthermore, as ESP32 implements the function sleep(uint32_t) iself, you need to change line 147 in the sketch from sleep(SLEEP_TIME); to sleep(SLEEP_TIME, false);.

Hope this helps!

Regards, Ei

[eiten]

As an additional info, sleep will not work on the ESP in version 2.3.2. Try the developement branch from the github if you need sleep, there I implemented this.

[ctodor]

@eiten Thx for the info.
"Try the developement branch from the github": can you give me the url?

[eiten]

@ctodor of course:
https://github.com/mysensors/MySensors/tree/development does contain sleep code for ESP. You can download the library here as a zip file.

[ctodor]

@eiten

[eiten]

@ctodor did you succeed?

[ctodor]

@eiten
Sorry for the late response, but I didn't had time to work on it until today.

Yes, I was able to compile but not to upload. After "uploading", the Arduino NANO ESP 32 disconects from the PC.
I must reset the board in order to be able to upload another sketch.

[eiten]

OK, so I suppose the build flags are incorrect. Do you use PlatformIO? Then, you could try:

build_flags = 
	-D ARDUINO_USB_MODE=1
	-D ARDUINO_USB_CDC_ON_BOOT=1

If you are on the Arduino IDE, you have to set Tools -> USB-Mode -> CDC-Mode. Ore something similar, I don't have the Arduino IDE installed ATM. IIRC, monitor speed must be set to 460800.

[ctodor]

@eiten Yep, I was able to upload the sketch after I've set Tools -> USB-Mode -> CDC-Mode.
Thank you for your help.

Well, I think I rushed with the conclusion.
Somehow, the bord is now in infinite boot loop:

0;255;3;0;14;Gateway startup complete.
0;255;0;0;18;2.3.2
ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x8 (TG1WDT_SYS_RST),boot:0x2b (SPI_FAST_FLASH_BOOT)
Saved PC:0x4200d223
SPIWP:0xee
mode:DIO, clock div:1
load:0x3fce3808,len:0x44c
load:0x403c9700,len:0xbe4
load:0x403cc700,len:0x2a68
entry 0x403c98d4

repetes over and over

[eiten]

That's strange. Is it exactly the code from above? It seems, it is in gateway mode, but in your sketch, you commented out the gateway option...

[ctodor]

@eiten You are right. It is not the same sketch. The previuos sketch seems to work fine (I used it just to make sure I am able to compile and upload).
Now I'm trying to upload a sketch where the ardunio runs as gateway and this is what a need , a gateway that receives messages from a few magnetic door sensors.
But please, don't waste your time with me. I think I'm going to write my simple protocol to do such a simple task.

Thank you very much for your effort.

[eiten]

@ctodor You are very welcome