EnviroDIY

2019-12-11 at 2:20 AM #13465

Participant

Wow, I just realized I didn’t really post any real question and still you are helping=)I’m really thankful and impressed by all your effort.

I have ordered a module with automatic flow control from Amazon but I didn’t want to wait for it to arrive so I started with what I had.
The module I have has been working nicely before but this time I can’t get it to work. In the past the timing turning the Enable pin low has been tricky for me. For simple programs I’ve used delays but I tried something like Nick Gammon’s solution under “Flushing the output” RS485 communications. But not in this case.

I using the “logging_to_ThingSpeak”-example with one Yosemitech Y504, AltSoftSerial (pins 5&6) and RE/DE on pin 4.
On my module the RE/DE are coupled together so you only need one pin. The restart happens even if I disconnect everything from the Mayfly logger. And the only way to stop it from happen is to set the “max485EnablePin” to -1. I will try some more examples to see if I can get it right with my coding.

// ==========================================================================
//    Settings for Additional Serial Ports
// ==========================================================================

// AltSoftSerial by Paul Stoffregen (https://github.com/PaulStoffregen/AltSoftSerial)
// is the most accurate software serial port for AVR boards.
// AltSoftSerial can only be used on one set of pins on each board so only one
// AltSoftSerial port can be used.
// Not all AVR boards are supported by AltSoftSerial.
#include <AltSoftSerial.h>
AltSoftSerial altSoftSerial;

// ==========================================================================
//    Yosemitech Y504 Dissolved Oxygen Sensor
// ==========================================================================
#include <sensors/YosemitechY504.h>

// Create a reference to the serial port for modbus
// Extra hardware and software serial ports are created in the "Settings for Additional Serial Ports" section
#if defined ARDUINO_ARCH_SAMD || defined ATMEGA2560
HardwareSerial &modbusSerial = Serial2;  // Use hardware serial if possible
 #else
AltSoftSerial &modbusSerial = altSoftSerial;  // For software serial if needed
// // NeoSWSerial &modbusSerial = neoSSerial1;  // For software serial if needed
#endif

byte y504ModbusAddress1 = 0x01;  // The modbus address of the Y504
//byte y504ModbusAddress2 = 0x05;  // The modbus address of the Y504 
const int8_t rs485AdapterPower = sensorPowerPin;  // Pin to switch RS485 adapter power on and off (-1 if unconnected)
const int8_t modbusSensorPower = -1;  // Pin to switch sensor power on and off (-1 if unconnected) TODO Change pin
const int8_t max485EnablePin = -1;  // Pin connected to the RE/DE on the 485 chip (-1 if unconnected)
const uint8_t y504NumberReadings = 10;  // The manufacturer recommends averaging 10 readings, but we take 5 to minimize power consumption

// Create a Yosemitech Y504 dissolved oxygen sensor object
YosemitechY504 y504_1(y504ModbusAddress1, modbusSerial, rs485AdapterPower, modbusSensorPower, max485EnablePin, y504NumberReadings);
//YosemitechY504 y504_2(y504ModbusAddress2, modbusSerial, rs485AdapterPower, modbusSensorPower, max485EnablePin, y504NumberReadings);

// ==========================================================================

// Settings for Additional Serial Ports

// ==========================================================================

// AltSoftSerial by Paul Stoffregen (https://github.com/PaulStoffregen/AltSoftSerial)

// is the most accurate software serial port for AVR boards.

// AltSoftSerial can only be used on one set of pins on each board so only one

// AltSoftSerial port can be used.

// Not all AVR boards are supported by AltSoftSerial.

#include <AltSoftSerial.h>

AltSoftSerial altSoftSerial;

// ==========================================================================

// Yosemitech Y504 Dissolved Oxygen Sensor

// ==========================================================================

#include <sensors/YosemitechY504.h>

// Create a reference to the serial port for modbus

// Extra hardware and software serial ports are created in the "Settings for Additional Serial Ports" section

#if defined ARDUINO_ARCH_SAMD || defined ATMEGA2560

HardwareSerial &modbusSerial = Serial2; // Use hardware serial if possible

#else

AltSoftSerial &modbusSerial = altSoftSerial; // For software serial if needed

// // NeoSWSerial &modbusSerial = neoSSerial1; // For software serial if needed

#endif

byte y504ModbusAddress1 = 0x01; // The modbus address of the Y504

//byte y504ModbusAddress2 = 0x05; // The modbus address of the Y504

const int8_t rs485AdapterPower = sensorPowerPin; // Pin to switch RS485 adapter power on and off (-1 if unconnected)

const int8_t modbusSensorPower = -1; // Pin to switch sensor power on and off (-1 if unconnected) TODO Change pin

const int8_t max485EnablePin = -1; // Pin connected to the RE/DE on the 485 chip (-1 if unconnected)

const uint8_t y504NumberReadings = 10; // The manufacturer recommends averaging 10 readings, but we take 5 to minimize power consumption

// Create a Yosemitech Y504 dissolved oxygen sensor object

YosemitechY504 y504_1(y504ModbusAddress1, modbusSerial, rs485AdapterPower, modbusSensorPower, max485EnablePin, y504NumberReadings);

//YosemitechY504 y504_2(y504ModbusAddress2, modbusSerial, rs485AdapterPower, modbusSensorPower, max485EnablePin, y504NumberReadings);