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My idea was to give the LoRa capability to my old project The SolarBot (Simple Solar BOT  ----Finale ) and read the sensor data via LoRa. Another option can also be to control the SolarBot via LoRa Connectivity and I want to check out if this works without a lag in real-time. Then one can control the SolarBot remotely via Lora and it can be used to send the BOT in hazardous conditions and measure data such as gas leaks, temperature, humidity.

What arrived in the packet?

Thank you to element14 for sending me the packet full of goodies with the Arduino MKR WAN1300, a nice shirt and a funny toy. In this project one of the Arduino MKR WAN 1300 acts as a Master connected to the sensors on the SolarBOT while the other will used to record the data send by the Solar BOT.

What I ordered extra are the Antennas for the LoRaWAN for Europe frequency band of 868 MHz from Molex. The Molex Antenna Part Number: 105262-0001 ISM 868/915 MHz Antenna. The link to the website https://www.molex.com/molex/products/datasheet.jsp?part=active/1052620001_ANTENNAS.xml

What is LoRa?

A quick description of what is LoRa.

LoRaWAN is the communication protocol and system architecture for the network. The LoRa physical layer enables the long-range communication link. Low–Power, Wide-Area Networks (LPWAN) can support a many of the devices for the Internet of Tings (IoT). LoRaWAN is designed to optimize LPWANs for battery lifetime, capacity, range, and cost.

How LoRa LPWAN physical layers works

Lora has slightly different defined frequency band for for different continents and countries. This information is useful in chosing the antennas which will be used for the MKR WAN1300

LoRaWAN for Europe: LoRaWAN defines ten channels, eight of which are multi data rate from 250bps to 5.5 kbps, a single high data rate LoRa channel at 11kbps, and a single FSK channel at 50kbps. The maximum output power allowed by ETSI in Europe is +14dBM, with the exception of the G3 band which allows +27dBm. There are duty cycle restrictions under ETSI but no max transmission or channel dwell time limitations.

Comparing Frequency band for different countries

A quick comparison to the other available technologies with respect to the LoRa for IOT devices.

Upcoming...

Getting LoRaWAN to work

Testing the Lora Protocol and Range

Interfacing the sensors to the LoRA MKR Relay Shield