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  • 18/11/2015

    I have used these in the past with great success in close range. I have recently deployed a set of these for a weather station. Transmit distance in my application is 200+ feet, through three walls of the house without issue. So far it has worked down to 30 degF. I followed the setup instructions found at Seed Studio on this device. When setting up the device, type in the command verbatim as found in the data sheet, including the + sign. Additionally, these devices will not tolerate being wired incorrectly. I accidentally applied +5 volts to a Rx or Tx pin, and that killed it. Double check wiring before applying power!

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  • 11/05/2017

    I waited for 28 days for these modules to arrive in South Africa. I managed to get some info on the modules on YouTube, and links to files (https://www.youtube.com/watch?v=DGRPqeacJns). I have tested a pair of these at the lowest power level and 9600baud, and was able to get range of about 30m (indoors). Will still test further when I get time. One thing you can look out for: If you are using PUTTY for your terminal session, and the device is in "setting parameters state", i.e. 'SET' pin in 'LOW' state, the command to send is: 'AT', and PUTTY sends each character as you type it, so the module will return 'ERROR' because it does not recognize the 'A' as a command. Use hyperterminal or arduino's serial monitor instead! You're welcome! Great product, great value for money, relatively easy to use!

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