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Where did you buy your hm-10 modules. I had a horrible problem with getting fakes online. Also, the voltage level question....You are using a FTDI cable that operates at 5 VOLTS. Do you need to use a voltage divider circuit (1k ohm/2k ohm) to bring down the voltage level to 3.3V at ftdi-TX/hm10-RX.I have to ask because i had blown up several hm-10 modules (and a usb aerial module) before figuring this out
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