ISS-MQTT-Gateway

Receive data from Davis Vantage Vue ISS - Weather Station and publish Measurements via MQTT

Hardware

• ESP 32
• Hope RFM69 Module @ 868MHz

Wireing

Power Supply

• ESP 32 via USB
• Hope RFM69 via ESP32

Functionality

• Receive Data from Davis Vanage ISS Weather Station
• Decode Raw Data to Weather Measurements
• This Measurments will be decoded:
  • WindSpeed [km/h]
  • WindDirection [0-359°]
  • BattWarning [0|1]
  • Additional Measurments:
    • GustSpeed [km/h]
    • OutsideTemperature [°C]
    • OutsideHumidity [%rel]
    • Rainrate [mm/h]
    • SolarRadiation
    • GoldcapVoltage [V]
• Publish Weather Measurements after each Packet received (every 2.5s) as Json Data e.g:
  • "WindSpeed": 3.22,
  • "WindDirection": 257,
  • "BattWarning": 0,
  • "Payload": "80:02:e1:1e:1b:05:b5:b3",
  • "Channel":1,
  • "RSSI":-74,
  • "msgID":8,
  • "OutsideTemperature":6.67
• Each Packet from the Davis ISS contains only one additional Measurment.

  Core-System-Functionality

  • Wifi Connection
  • MQTT Connection
  • Self Monitoring connectivity and reconnect on connection loss
  • Command Parser accepts commends over MQTT
  • MQTT Status Topic, retained, with LastWill
  • CRON System which sends different MQTT Topics every 10s, 30s and 60s
  • Automatic Versioning System
• Version Number is incremented after Upload to Production Target

  Example JSON-Data

  

  Available MQTT-Commands

  • Commands must be published to topic [PREFIX]/cmd
  • Responses are published to [PREFIX]/result

Reset Daily Rain-Click Counter to 0

newday

Example:

• command: newday
• response: Daily Rain-Click counter set to 0 :

Set Rain-Click Counter

setrc [newvalue]

Example:

• command: setrc 42
• response: Raincounter set to 42

Reset Statistics

Set Statistical values to 0:

• Longest Time without reception
• Number of packets with correct CRC
• How often did we HOP because of missing packets
• How often did we have to resync
• Number of uninterruptedly receiverd correct packages
• Maximum Number of uninterruptedly receiverd correct packages
• Number of packets with CRC ERROR

  reset

  Example:

• command: reset
• response: Raincounter set to 42

Reboot ESP32

reboot

Example:

• command: reboot
• response: Rebooting in 5 seconds ... [please standby].

Pictures

ESP32 Board with Connections

RFM69 Board with Connections

Both Board

In the Box with exposed Antenna

Antenna covered

5V Power Supply

Installed