Review on 📡 MakerFocus 2pcs NRF24L01+PA+LNA Wireless Transceiver RF Transceiver Module 2.4G 1100m with Antenna for Ar duino - Enhanced Signal, Antistatic Foam Compatible by Dre Fishburne

UPDATE: Unit may have temperature stability issues. Using the remote control in the greenhouse, I found that the communication stopped working as the temperature in my greenhouse dropped. As the temperature got warmer, it started working again. I don't have a full-fledged engineering lab to test frequency stability over temperature changes, but I assume the reference oscillator is poorly temperature-compensated. ORIGINAL: The devices were received quickly and packed in anti-static protective bags in the carton. Connected to an Arduino Uno R3 and uses the existing available Arduino driver libraries. Used the sample program provided in the Arduino library and both devices were transmitting and receiving on the second attempt - the first attempt had errors due to overload, the receiver just had too much transmit power for the devices slowly approaching the table - turn on the power Minimum in the code and it worked great. I wrote a sketch (program) for exchanging text between two devices just to try. I've seen some complaints from other reviewers that it doesn't work or the link is prone to errors - for me it's not at all. I've just made sure that each radio is a few inches from the Arduino control box (to avoid radiated noise to both the transmitter and receiver) and that transmit power is kept to a minimum when the devices are in close proximity (to avoid overexciting others). ) . device receiver). I use them with the 3.3v breakout boards also available from Revain as they have high transfer performance and don't need to add capacitors to reduce noise on the power line. Some people have mentioned that this is required on some Arduino forums. The library also has an option to enable CRC error detection, or you can add it yourself. There is ACK and all sorts of functions to improve communication reliability. Much luck!