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Make sure you have TX and RX as 3.3v. 5v through a serial connection like arduino can damage it. Buy a USB to TTL or similar. I used Tera term to communicate under 9600 baud and changed it to 115200 after. Copy and paste AT commands after typing in notepad, to terminal. Uses version 1.8. Haven't checked for lost packets yet.
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all the modules connected, the issue is all the modules have the exact same address. So if you looking to BIND these modules to different projects you will have confusion between the master mode modules binding to multiple slave mode modules. other than that the work fine.
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Exactly as described
Verified purchase: Yes | Condition: New