Wohooo, it works! 
Thanks @kamaradclimber , the buggy code was the reason. I also changed the code for sensor version V3 - I’m not the best programmer either (in fact not even a good one), so I mixed the original code from makerfabs and the code from @Refuge in void send_lora()
:
→ Lora Soil Moisture Sensor V3:
#include <SPI.h>
#include <Wire.h>
#include <RadioLib.h>
#include <avr/wdt.h>
#include <avr/sleep.h>
#include "I2C_AHT10.h"
//#include <LoRa.h>
#include <ArduinoJson.h>
#define NODENAME "LORA_POWER_1"
String node_id = String("ID") + "010442";
//Set sleep time, when value is 1 almost sleep 20s,when value is 450, almost 1 hour.
//#define SLEEP_CYCLE 450
#define SLEEP_CYCLE 38 //5 Minuten
//Lora set
//Set Lora frequency
// #define FREQUENCY 434.0
#define FREQUENCY 868.0
//#define FREQUENCY 915.0
#define BANDWIDTH 125.0
#define SPREADING_FACTOR 9
#define CODING_RATE 7
#define OUTPUT_POWER 10
#define PREAMBLE_LEN 8
#define GAIN 0
//328p
#define DIO0 2
#define DIO1 6
#define LORA_RST 4
#define LORA_CS 10
#define SPI_MOSI 11
#define SPI_MISO 12
#define SPI_SCK 13
//pin set
#define VOLTAGE_PIN A3
#define PWM_OUT_PIN 9
#define SENSOR_POWER_PIN 5
#define ADC_PIN A2
#define DEBUG_OUT_ENABLE 1
SX1276 radio = new Module(LORA_CS, DIO0, LORA_RST, DIO1);
AHT10 humiditySensor;
String jsonoutput = ""; // string für json-übertragung
bool readSensorStatus = false;
int sensorValue = 0; // variable to store the value coming from the sensor
int batValue = 0; // the voltage of battery
int count = 0;
int ADC_O_1; // ADC Output First 8 bits
int ADC_O_2; // ADC Output Next 2 bits
int16_t packetnum = 0; // packet counter, we increment per xmission
float temperature = 0.0;
float humidity = 0.0;
bool AHT_init()
{
bool ret = false;
Wire.begin();
if (humiditySensor.begin() == false)
{
#if DEBUG_OUT_ENABLE
Serial.println("AHT10 not detected. Please check wiring. Freezing.");
#endif
}
if (humiditySensor.available() == true)
{
temperature = humiditySensor.getTemperature();
humidity = humiditySensor.getHumidity();
ret = true;
}
if (isnan(humidity) || isnan(temperature))
{
#if DEBUG_OUT_ENABLE
Serial.println(F("Failed to read from AHT sensor!"));
#endif
}
return ret;
}
void Lora_init()
{
int state = radio.begin(FREQUENCY, BANDWIDTH, SPREADING_FACTOR, CODING_RATE, SX127X_SYNC_WORD, OUTPUT_POWER, PREAMBLE_LEN, GAIN);
Serial.println(state);
if (state == ERR_NONE)
{
#if DEBUG_OUT_ENABLE
Serial.println(F("success!"));
#endif
}
else
{
#if DEBUG_OUT_ENABLE
Serial.print(F("failed, code "));
Serial.println(state);
#endif
// while (true)
// ;
}
}
void setup()
{
#if DEBUG_OUT_ENABLE
Serial.begin(115200);
Serial.println("Soil start.");
Serial.print(FREQUENCY);
Serial.println(" Mhz");
#endif
delay(100);
// set up Timer 1
pinMode(PWM_OUT_PIN, OUTPUT);
TCCR1A = bit(COM1A0); // toggle OC1A on Compare Match
TCCR1B = bit(WGM12) | bit(CS10); // CTC, scale to clock
OCR1A = 1;
pinMode(LORA_RST, OUTPUT);
digitalWrite(LORA_RST, HIGH);
delay(100);
pinMode(SENSOR_POWER_PIN, OUTPUT);
digitalWrite(SENSOR_POWER_PIN, HIGH); //Sensor power on
delay(100);
Lora_init();
Wire.begin();
if (humiditySensor.begin() == false)
{
#if DEBUG_OUT_ENABLE
Serial.println("AHT10 not detected. Please check wiring. Freezing.");
#endif
}
#if DEBUG_OUT_ENABLE
else
Serial.println("AHT10 acknowledged.");
#endif
do_some_work();
//setup over
#if DEBUG_OUT_ENABLE
Serial.println("[Set]Sleep Mode Set");
#endif
low_power_set();
}
void loop()
{
wdt_disable();
if (count > SLEEP_CYCLE) //(7+1) x 8S 450
{
#if DEBUG_OUT_ENABLE
//code start
Serial.println("Code start>>");
#endif
do_some_work();
all_pins_low();
#if DEBUG_OUT_ENABLE
//code end
Serial.println("Code end<<");
#endif
//count init
count = 0;
}
low_power_set();
}
ISR(WDT_vect)
{
#if DEBUG_OUT_ENABLE
Serial.print("[Watch dog]");
Serial.println(count);
#endif
delay(100);
count++;
//wdt_reset();
wdt_disable(); // disable watchdog
}
//Set low power mode and into sleep
void low_power_set()
{
all_pins_low();
delay(10);
// disable ADC
ADCSRA = 0;
sleep_enable();
watchdog_init();
set_sleep_mode(SLEEP_MODE_PWR_DOWN);
delay(10);
noInterrupts();
sleep_enable();
// turn off brown-out enable in software
MCUCR = bit(BODS) | bit(BODSE);
MCUCR = bit(BODS);
interrupts();
sleep_cpu();
sleep_disable();
}
//Enable watch dog
void watchdog_init()
{
// clear various "reset" flags
MCUSR = 0;
// allow changes, disable reset
WDTCSR = bit(WDCE) | bit(WDE);
WDTCSR = bit(WDIE) | bit(WDP3) | bit(WDP0); // set WDIE, and 8 seconds delay
wdt_reset(); // pat the dog
}
void do_some_work()
{
digitalWrite(SENSOR_POWER_PIN, HIGH); // Sensor/RF95 power on
digitalWrite(LORA_RST, HIGH);
delay(5);
pinMode(PWM_OUT_PIN, OUTPUT); //digitalWrite(PWM_OUT_PIN, LOW);
TCCR1A = bit(COM1A0); // toggle OC1A on Compare Match
TCCR1B = bit(WGM12) | bit(CS10); // CTC, scale to clock
OCR1A = 1; // compare A register value (5000 * clock speed / 1024).When OCR1A == 1, PWM is 2MHz
Lora_init();
delay(50);
//ADC2 AVCC as reference voltage
ADMUX = _BV(REFS0) | _BV(MUX1);
//ADC2 internal 1.1V as ADC reference voltage
//ADMUX = _BV(REFS1) |_BV(REFS0) | _BV(MUX1);
// 8 分频
ADCSRA = _BV(ADEN) | _BV(ADPS1) | _BV(ADPS0);
delay(50);
for (int i = 0; i < 3; i++)
{
//start ADC conversion
ADCSRA |= (1 << ADSC);
delay(10);
if ((ADCSRA & 0x40) == 0)
{
ADC_O_1 = ADCL;
ADC_O_2 = ADCH;
sensorValue = (ADC_O_2 << 8) + ADC_O_1;
ADCSRA |= 0x40;
//Mod for value from in 0 to 100
// 1000 = Air dry, 500 ultrawet
sensorValue = (sensorValue - 500) / 5;
// End
#if DEBUG_OUT_ENABLE
Serial.print("ADC:");
Serial.println(sensorValue);
#endif
if (readSensorStatus == false)
readSensorStatus = AHT_init();
}
ADCSRA |= (1 << ADIF); //reset as required
delay(50);
}
//ADC3 internal 1.1V as ADC reference voltage
ADMUX = _BV(REFS1) | _BV(REFS0) | _BV(MUX1) | _BV(MUX0);
delay(50);
for (int i = 0; i < 3; i++)
{
//start ADC conversion
ADCSRA |= (1 << ADSC);
delay(10);
if ((ADCSRA & 0x40) == 0)
{
ADC_O_1 = ADCL;
ADC_O_2 = ADCH;
batValue = (ADC_O_2 << 8) + ADC_O_1;
ADCSRA |= 0x40;
#if DEBUG_OUT_ENABLE
Serial.print("BAT:");
Serial.println(batValue);
float bat = (float)batValue * 3.3;
bat = bat / 1024.0;
Serial.print(bat);
Serial.println("V");
#endif
}
ADCSRA |= (1 << ADIF); //reset as required
delay(50);
}
send_lora();
delay(1000);
radio.sleep();
packetnum++;
readSensorStatus = false;
digitalWrite(SENSOR_POWER_PIN, LOW); // Sensor/RF95 power off
delay(100);
}
void all_pins_low()
{
pinMode(PWM_OUT_PIN, INPUT);
pinMode(A4, INPUT_PULLUP);
pinMode(A5, INPUT_PULLUP);
delay(50);
}
void send_lora()
{
// Create json object for transfer
DynamicJsonDocument root(256);
root["node_id"] = node_id;
root["hum"] = (String)humidity;
root["temp"] = (String)temperature;
root["adc"] = (String)sensorValue;
root["bat"] = (String)batValue;
serializeJson(root, jsonoutput);
#if DEBUG_OUT_ENABLE
serializeJson(root, Serial);
#endif
radio.transmit(jsonoutput);
jsonoutput = "";
}
→ HomeAssistant Sensor.yaml:
# Beispielstring {"rssi":-81,"snr":13.25,"pferror":-5714,"packetSize":76,"message":"{\"node_id\":\"ID010442\",\"hum\":\"47.21\",\"temp\":\"26.46\",\"adc\":\"930\",\"bat\":\"1023\"}"}
- platform: mqtt
name: "ID010442_humidity"
state_topic: "home/OpenMQTTGateway/LORAtoMQTT"
value_template: >-
{% if (value_json.message|from_json).node_id == "ID010442" %}
{{ (value_json.message|from_json).hum }}
{% else %}
{{ is_state_attr("sensor.soil_01_Humidity") | round(2) }}
{% endif %}
unit_of_measurement: '%'
icon: mdi:water-percent
- platform: mqtt
name: "ID010442_temperature"
state_topic: "home/OpenMQTTGateway/LORAtoMQTT"
value_template: >-
{% if (value_json.message|from_json).node_id == "ID010442" %}
{{ (value_json.message|from_json).temp }}
{% else %}
{{ is_state_attr("sensor.soil_01_Temperature") | round(2) }}
{% endif %}
unit_of_measurement: '°C'
- platform: mqtt
name: "ID010442_ADC"
state_topic: "home/OpenMQTTGateway/LORAtoMQTT"
value_template: >-
{% if (value_json.message|from_json).node_id == "ID010442" %}
{{ (value_json.message|from_json).adc }}
{% else %}
{{ is_state_attr("sensor.soil_01_adc") }}
{% endif %}
unit_of_measurement: 'µS/cm'
icon: mdi:flower
- platform: mqtt
name: "ID010442_BAT"
state_topic: "home/OpenMQTTGateway/LORAtoMQTT"
value_template: >-
{% if (value_json.message|from_json).node_id == "ID010442" %}
{{ (value_json.message|from_json).bat }}
{% else %}
{{ is_state_attr("sensor.soil_01_battery") }}
{% endif %}
unit_of_measurement: 'V'
icon: mdi:battery
I´ve modified the code in that way, that the value for moisture is in a range from 0 to 100.
Next step is to merge the thre custom sensors in HomeAssistant to one with multiple attributes.
