RFM69 JSON (Battery)Multisensor

This project is a multisensor node based on a Atmega328 and RFM69 radio. The Sensor is a ultraLowPower(0.1uA) device supplied from 1.8V to 3.6V.

You can connect the node with the Gateway via MQTT to your home automation. Just download .hex and flash it with avr studio. Fuses for use without ext crystal are: low_fuses=0xd2 high_fuses=0xd1 extended_fuses=0xfe (extended_fuses=0xff = BrownOut off = UltraLowPower) Fuses for use with ext crystal are: low_fuses=0xff high_fuses=0xd1 extended_fuses=0xfe (extended_fuses=0xff = BrownOut off = UltraLowPower). And cut the cooper between RFM and crystal inputs (atmega).

Board

The board has

• 7 GPIOs including 4 analog inputs
• spi connector
• 3 Leds
• Micro step up via capacitor
• 2 levelshifter or nFet to power sensors ect
• dimensions are 19x22mm

The board you can order here or other PCB Services. You also can send a Email, my price is 0,80€.

Software Features

Supported sensors

• BME280 BMP280
• DS18b20 (in future)
• HC-SR05 (in future)
• every switch (pir (hc-sr501), touch sensors (TTP223), reed kontakt, hall Sensor (DRV5032FADBZT) ect)
• light sensor (LDR)
• every analog Sernsor (rain sensor, plant sensor, ect)
• S0 energy counter

Supported aktors

• every aktor which can be used on a DIO
• watchdog can clear/set DOs
• ssd1306 displays
• any electronic thermostat with encoder to set temperature

Software

• very simple configuration via Gateway
• communication encrypted
• free configurable via radio, no flash programming needed, every node has the same software
• interrupts wakes the node
• the DO can be cleared/set by internal watchdog
• counters on each DI
• programmable sleep times
• programmable sensor measure times
• programmable watchdog times
• and more... you can see here

Home Assistant config

note: use different command_topic (anyChar). The topic from broker to node is rfmOut/networkId/nodeId/anyChar, the topic from node to broker is rfmIn/networkId/nodeId/jsonValue

Temperature, humidity, pressure, battery, rssi, counter(p_0-p_6)

sensor:
  - platform: mqtt
    state_topic: 'rfmIn/146/254/Bt'
    name: 'Temperature'
    unit_of_measurement: '°C'
    value_template: '{{ value_json.Bt }}'
  - platform: mqtt
    state_topic: 'rfmIn/146/254/Bh'
    name: 'Humidity'
    unit_of_measurement: '%'
    value_template: '{{ value_json.Bh }}'
  - platform: mqtt
    state_topic: 'rfmIn/146/254/Bp'
    name: 'Pressure'
    unit_of_measurement: 'hPa'
    value_template: '{{ value_json.Bp }}'
  - platform: mqtt
    state_topic: 'rfmIn/146/254/batt'
    name: 'Battery'
    unit_of_measurement: 'mV'
    value_template: '{{ value_json.batt }}'
  - platform: mqtt
    state_topic: 'rfmIn/146/254/c_4'
    name: 'Counter'
    value_template: '{{ value_json.c_4 }}'
  - platform: mqtt
    state_topic: 'rfmIn/146/254/rxInfo'
    name: 'RSSI'
    value_template: '{{ value_json.rssi }}'

Switches (input) p_0-p_6

binary_sensor:
  - platform: mqtt
    state_topic: "rfmIn/146/250/p_5"
    name: "PIR"
    payload_on: "1"
    payload_off: "0" 
    device_class: opening
    value_template: '{{ value_json.p_5 }}'

input slider to set temperature of digital termostat

# Define input_slider
input_slider:
  target_temp:
    name: Target Heater Temperature Slider
    min: 5
    max: 30
    step: 1
    unit_of_measurement: step 
    icon: mdi:target
 
automation:
   # This automation script runs when the target temperature slider is moved.
   # It publishes its value to the same MQTT topic it is also subscribed to
   # The message is json format
  - alias: Temp slider moved
    trigger:
      platform: state
      entity_id: input_slider.target_temp
    action:
      service: mqtt.publish
      data_template:
        topic: "rfmOut/146/250/2"
        retain: true
        payload: "{\"t_0\":\"{{ states.input_slider.target_temp.state | int }}\"}"

Outputs p_0-p_6

switch:
  - platform: mqtt
    name: "Test Switch"
    state_topic: "rfmIn/146/254/p_4"
    command_topic: "rfmOut/146/254/1"
    payload_on: "{\"p_4\":\"1\"}"
    payload_off: "{\"p_4\":\"0\"}"
    optimistic: false
    retain: true

Display

switch:
  - platform: mqtt
    name: "Test Switch"
    command_topic: "rfmOut/146/254/1"
    payload_on: "{\"d_0\":\"Switch ON\"}"
    payload_off: "{\"d_0\":\"Switch OFF\"}"
    optimistic: true
    retain: true

Watchdog ''' input_boolean: trigger_wd_terrasse: name: Watchdog Terrasse initial: off switch_terrasse_m: name: Terrasse m initial: off

automation:

• alias: Trigger Watchdog trigger: platform: state entity_id: input_boolean.trigger_wd_terrasse to: "on" action:

  • service: mqtt.publish data_template: topic: "rfmOut/146/116/wd" retain: false payload: "{"wd_0":"0"}"
  • service: input_boolean.turn_off data: entity_id: input_boolean.trigger_wd_terrasse

• alias: Trigger Watchdog auto trigger: platform: time seconds: 59 condition: condition: or conditions: - condition: state entity_id: input_boolean.switch_terrasse_vl state: "on" - condition: state entity_id: input_boolean.switch_terrasse_m state: "on" action: service: input_boolean.turn_on data: entity_id: input_boolean.trigger_wd_terrasse

• alias: Start Timer Terrasse m trigger: platform: state entity_id: input_boolean.switch_terrasse_m to: "on" action: service: mqtt.publish data_template: topic: "rfmOut/146/116/p_5" retain: false payload: "{"wd_0":"0", "p_5":"1"}"

• alias: Schalte Ventil Terrasse m aus trigger: platform: state entity_id: input_boolean.switch_terrasse_m to: "off" action: service: mqtt.publish data_template: topic: "rfmOut/146/116/p_5" retain: false payload: "{"p_5":"0"}" '''

Hardware

Housing

3AAA_PIR_Node

3AAA_PIR_Node inside, modification PIR (nFet or diode bat46 4148 ect)

2AAA_Node

2AAA_Node_inside

Display_housing

Mini_Node_1

Mini_Node_2 use the shown BME/BMP Sensor!

Modification_Display