03 Aug

433 MHz Packet Radio Stacks: an easy to use frequency-diverse mesh network

Bhavik Joshi

This week, our team of summer undergrads began planning the integration of all of our projects together into one big integrated demo. So, I had to start making my networking code and hardware easy to add into and use in my peers’ projects. To do so, I switched from using the small 433 MHz packet rad...

27 Jul

Latency Differences Between Wifi and 433 MHz Packet Radios in my Diverse Mesh Network

Bhavik Joshi

Last week, the two biggest things that we accomplished were making one node in the mesh network into an MQTT bridge, which would connect to an MQTT broker to be able to use the dash with the mesh network, as well as set up the RFM69HCW 433 MHz packet radios into a unicast mesh network. So, using t...

19 Jul

433 MHz Packet Radio Signal Strength Over Distance Tests

Bhavik Joshi

Last week, I set up the RFM69HCW 433 MHz radio hardware to be able send messages from one radio to the other. Below is a picture of the set up. I have the 433 MHz packet radio on a breadboard and connected to an ESP32 Feather Board, as well as attached to a quarter-wavelength antenna (about 17 centi...

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