January 16, 2017 1 Comment
Hey the 90’s called err, paged… yeah remember those? I missed out on having a pager, so why not create my own and rock it — complete with a tiny display and mario ring tones!
I really need to make a belt clip for this. hmm Anyway I created a pager with the idea that it should get a few weeks between charges on a 150mah battery. Some specs on the two iterations I made:
First iteration is based on a Si4432 radio. With a max range of ~1/2 a mile in a fairly urban environment (metal fences, wood/drywall buildings) at 433Mhz, 2dB omni antennas, 100mW tx power, GFSK modulation, 56uA when it’s sleeping, ~90mA when it’s talking to the base station. ~3$ radio module
Second iteration is on a Sx1276 LORA radio. Max range is upgraded to roughly 2 miles with Lora modulation — same environment at at 910Mhz, 2dB/5dB omni antennas, 100mW tx
power, 56uA when it’s sleeping, ~90mA when it’s talking to the base station. ~10$ radio module.
Yeah I’m leaving out a lot of the fine details on the modulation, but i’ll post source code if anyone is really interested.
Quick video of me rambling just a heads up I am up for making this into a kit if anyone is interested.
Expect another post with Sx1276 range test (lora range test)