Bmp badge led software8/4/2023 So with the software working, the next job was to have a look at what it was sending to the device. The device installed as a serial device (the common Prolific PL2303 driver) and the supplied software successfully sent messages to it: So the first job was to get the device running on my Windows PC. I can then get the Pi to display the current tracker status – e.g. Messages are stored internally in flash memory so the device can be powered off and it will retain the message.įor my purposes, I want to be able to send a message from a Pi, and have the device display that message (scrolling if necessary) until I replace the message with another one. They come with Windows drivers and software to download messages to the device, the intention being that you download your message then unplug and run the display from its internal battery. These displays typically have a USB socket for charging and programming, and appear to a PC or Pi as a virtual serial port. I opted for an “LED badge” which is a small scrolling message board, purchased on ebay for £13 (about $20). To build this I needed a WiFi-connected computer (a Raspberry Pi is an obvious choice) plus a display that is easily visible in a variety of lighting conditions. For a while I’ve wanted to build a “Flight Readiness” unit that I can have near me when filling a balloon, and will show me if the tracker is running OK or if there’s a problem with the tracker or receiver (e.g.
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