Makerfire 10pcs Arduino NRF24L01+ 2.4GHz sold by MakerFocus. I tested all ten devices, one of which did not provide reliable communication at a distance of less than 5 feet. Another intermittent 16 feet over a wall. Everything else worked reliably up to 16 feet, including a wall. The range could be longer, but then I had more walls. I set the performance to maximum and used the slowest baud rate of 250 kbps. As test code I used https://forum.arduino.cc/index.php?topic=421081.0. Eight out of 10 at this price point isn't bad but I need more range. I need to battery power one of them so I can test it outdoors.
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