Archive for the ‘LoRa’ Category.

Convert TTIG to TTOG

I bought used outdoor WiFi access point for couple of coffees. At first I wanted to use only the housing for conversion of the TTN Indoor gateway to outdoor gateway. But after some testing and factory reset of the AP I found out it is working and could be configured as stand-alone WiFi MIMO AP. Usually such APs require infrastructure, or at least some management server.

Aruba networks AP175
Continue reading ‘Convert TTIG to TTOG’ »

How to Integrate LoRa sensor to Weather Underground

This is short tutorial how to send data from sensor connected to The Things Network via LoRaWAN to Weather Underground. I will use Scidrom air quality sensor whic I developed for students in local school. Just a quick reminder the “AQ” sensor detects PM10, PM2,5 particles, air pressure, temperature and humidity and solar radiation in visible in UV spectrum. More details are available in older post.

Read mor

Outdoor UV index sensor

Here are instructions for outdoor UV index and ambient light sensor.

Assembled UV index and ambient light sensor
Continue reading ‘Outdoor UV index sensor’ »

Low cost solar radiation shield

The solar radiation shield is a low cost DIY device to protect temperature, relative humidity and other sensors from the weather, while shielding them from the sun for highest accuracy. Provided here are instructions and files. It require some CNC machinig, but then it could be assembled in minutes. It is made from plant pot saucers.

Continue reading ‘Low cost solar radiation shield’ »

Multisensor LoRa interface module

A multisensor LoRa end device has been designed for connecting different sensors to LoRa network. It’s primary use can be LoRa weather station but is not limited only to enviromental applications.

LoRa sensor interface – typical application

Typical “weather” application is shown in image above: 1-LoRa sensor interface, 2-Particle sensor, 3-Sun shield with temperature and humidity sensors, 4-UV-index and illumination sensor, 5-solar panel for autonomous operation. Different sensors will be described separately. I hope this project could grow into different directions.

Continue reading ‘Multisensor LoRa interface module’ »

Preparing wine with IoT sensors

Every wine producer needs to know their temperature during fermentation. There are many small producers (like in our family) without high-end equipment for fermenting the grapes and must. We produce wine for our own use (around 1000 litres) and the technology relies mostly on experience and limited information about the fermentation process.  One of the most important paramters is temperature or more specifically, the temperature profile (time dependance), its gradient and maximum value as well. In the past I connected simple I2C sensor to raspberry pi and sent data to mysql database via WiFi connection. It is shame to mention the power consumption of such thermometer.

Loradunchy module on top of the low cost solar cell

Recently, I placed LoRaWAN gateway at the top of the vineyard to cover all future need for connecting winegrowing sensors in all neighbouring vineyards. The r.pi thermometer was upgraded to LoRa and I used my own design, the LoRaDunchy module with small LiPo battery, TMP75 as sensor element and small solar cell for supplying the power. Solar power is somehow overkill for this application, but I want to check the real life solar powered sensor. It would be good experience for future sensors which I intend to place in the field for monitoring the microclimatic conditions (and possible prediction of the vine diseases).

LoraDunchy Connection diagram for thermometer application

Continue reading ‘Preparing wine with IoT sensors’ »

Particle Sensor with LoRa

Two PCBs from earlier projects were used in this project:

  1. LoRa breakout board
  2. Sensor PCB with Si7013 humidity sensor from multisensor LoRa project
  3. … and particle sensor.

 

Finished particle sensor in housing, ready for the TTN

Continue reading ‘Particle Sensor with LoRa’ »

Small “rubber-ducky” helical antenna for 868MHz

This simple Helical Antenna can be used for most LoRa (and other small wireless device) applications, where space constraints exist. The construction is simple, made from wound solid Ag plated copper wire taken from piece of coaxial cable.

Helical axial antenna for 868MHz

Two options how to use this antenna on the PCB modules

Continue reading ‘Small “rubber-ducky” helical antenna for 868MHz’ »

LoraDunchy Arduino Nano pin-compatibile LoRa module with power management

Lora board with Arduino nano compatibile pinout and simple battery management

Small board with arduino nano compatibile pinout with power management and Murata ABZ LoRa module with STM32L0 microcontroller

Features

  • LoRa module: Murata ABZ
  • Single cell LiPo cell charger on-board with charging signal internally connected to PA11 (via jumper)
  • Buck/Boost switching power supply for delivering stable 3,3V regardless of the batterz voltage
  • Battery fuel gauge on-board to control the real status of the battery

 

Schematic diagram

Continue reading ‘LoraDunchy Arduino Nano pin-compatibile LoRa module with power management’ »

RAK811 3D model and plastic housing

There was no3D model for RAK811 breakout board with GPS tracker, so I made it from the drawings. I added plastic housing to be used with velcro straps. I prepared two models, one with only RAK811 and small LiPo battery and second one, 4mm higher with enough space for additional PCB with custom electronics. Enjoy.

Higher version with additional PCB

Lower version without additional PCB

Base is same for both versions.

Continue reading ‘RAK811 3D model and plastic housing’ »