Fail testing with NodeMCU 8266

[clabnet]

Hi, I have two NodeMCU V2 and a pair of E32868TD. Using this library I can't connect correctly the E32 with MCU.

There are the connections

I have tried much many options, first using assigning -1 to M0, M1, and AUX. Result : continuous reboot of MCU. It seems the -1 don't work.

The last I used complete GPIO assigning, and also no working.

#define PIN_RX  10
#define PIN_TX  9
#define PIN_M0  4
#define PIN_M1  5
#define PIN_AUX 14

This is my entire receiver code, it is the same as is your sample, plus led :

void setup()
{

  Serial.begin(115200);

  pinMode(LED_BUILTIN, OUTPUT);    // Initialize the LED_BUILTIN pin as an output
  digitalWrite(LED_BUILTIN, HIGH); // Turn the LED off by making the voltage HIGH    }

  ESerial.begin(9600);
  Serial.println("Starting Receiver");

  // this init will set the pinModes for you
  Transceiver.init();

  // all these calls are optional but shown to give examples of what you can do

  // Serial.println(Transceiver.GetAirDataRate());
  // Serial.println(Transceiver.GetChannel());

  // Transceiver.SetAddressH(1);
  // Transceiver.SetAddressL(0);
  // Chan = 5;
  // Transceiver.SetChannel(Chan);
  // save the parameters to the unit,
  // Transceiver.SaveParameters(PERMANENT);

  // you can print all parameters and is good for debugging
  // if your units will not communicate, print the parameters
  // for both sender and receiver and make sure air rates, channel
  // and address is the same

  Transceiver.PrintParameters();
}

void loop()
{

  // if the transceiver serial is available, proces incoming data
  // you can also use Transceiver.available()

  if (ESerial.available())
  {

    digitalWrite(LED_BUILTIN, LOW); // Turn the LED on by making the voltage LOW
    delay(50);
    digitalWrite(LED_BUILTIN, HIGH); // Turn the LED off by making the voltage HIGH    }
    delay(50);

    // i highly suggest you send data using structures and not
    // a parsed data--i've always had a hard time getting reliable data using
    // a parsing method

    Transceiver.GetStruct(&MyData, sizeof(MyData));

    // dump out what was just received
    Serial.print("Count: ");
    Serial.println(MyData.Count);
    Serial.print("Bits: ");
    Serial.println(MyData.Bits);
    Serial.print("Volts: ");
    Serial.println(MyData.Volts);
    // if you got data, update the checker
    Last = millis();
  }
  else
  {
    delay(50);
  }
}

The result is always

Starting Receiver
trying: 0
trying: 1
trying: 2
trying: 3
trying: 4
----------------------------------------
Model no.: 0
Version  : 0
Features : 0

Mode (HEX/DEC/BIN): 0/0/0
AddH (HEX/DEC/BIN): 0/0/0
AddL (HEX/DEC/BIN): 0/0/0
Sped (HEX/DEC/BIN): 0/0/0
Chan (HEX/DEC/BIN): 0/0/0
Optn (HEX/DEC/BIN): 0/0/0
Addr (HEX/DEC/BIN): 0/0/0

SpeedParityBit (HEX/DEC/BIN)    : 0/0/0
SpeedUARTDataRate (HEX/DEC/BIN) : 0/0/0
SpeedAirDataRate (HEX/DEC/BIN)  : 0/0/0
OptionTrans (HEX/DEC/BIN)       : 0/0/0
OptionPullup (HEX/DEC/BIN)      : 0/0/0
OptionWakeup (HEX/DEC/BIN)      : 0/0/0
OptionFEC (HEX/DEC/BIN)         : 0/0/0
OptionPower (HEX/DEC/BIN)       : 0/0/0
----------------------------------------

It seems doesn't have the connection between NODEMCU and E32. The RX is powered by 3.3 V, the common as the same as ground of MCU.

I have tested the two NodeMCU and two E32, same issue. I have changed a lot of wires and I have tested all what I could. Any chance to run ?

Thanks, regards

Claudio

[KrisKasprzak]

Not sure of your pin definition is the GPIO pin of the pin number. Also I'm not sure you can use any GPIO pin for serial. This worked for me

/* This example shows how to connect to an EBYTE transceiver using an ESP8266 This code for for the sender connections

*/

include

include "EBYTE.h"

/ WARNING: IF USING AN ESP8266 DO NOT USE THE PIN NUMBERS PRINTED ON THE BOARD YOU MUST USE THE ACTUAL GPIO NUMBER /

define PIN_RX 14 //D5 on the board (connect this to the EBYTE TX pin)

define PIN_TX 12 //D6 on the board (connect this to the EBYTE RX pin)

define PIN_M0 5 //D1 on the board (connect this to the EBYTE M0 pin)

define PIN_M1 4 //D2 on the board (connect this to the EBYTE M1 pin)

define PIN_AX 16 //D0 on the board (connect this to the EBYTE AUX pin)

// i recommend putting this code in a .h file and including it // from both the receiver and sender modules

// these are just dummy variables, replace with your own struct DATA { unsigned long Count; int Bits; float Volts; float Amps;

};

int Chan; DATA MyData; int i;

// you will need to define the pins to create the serial port SoftwareSerial ESerial(PIN_RX, PIN_TX);

// create the transceiver object, passing in the serial and pins EBYTE Transceiver(&ESerial, PIN_M0, PIN_M1, PIN_AX);

[KrisKasprzak]

My initial response had a typo but has been updated. Make sure MCU Rx connects to EBTYE Tx and MCU Tx connects to EBTYE Rx.

define PIN_RX 14 //D5 on the board (connect this to the EBYTE TX pin)

define PIN_TX 12 //D6 on the board (connect this to the EBYTE RX pin)

define PIN_M0 5 //D1 on the board (connect this to the EBYTE M0 pin)

define PIN_M1 4 //D2 on the board (connect this to the EBYTE M1 pin)

define PIN_AX 16 //D0 on the board (connect this to the EBYTE AUX pin)