Dragino RS485_LB

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Andrew Phillips

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Jul 30, 2026, 3:28:15 AM (5 days ago) Jul 30

to Dragino-user

Hello Dragino

I have the above unit and appear to have two problems.

I have tried to connect via a Bluetooth Serial Terminal and I just get an endless stream of Mincorrect Password lines the millisecond it connects. I have tried the AT pin both as AT+PIN=xxxxxxx, I have tried to reset the unit with the button. tried to power down. When I have managed to stop the endless stream, the app says connected but no response at all from the sensor. Also, I have a USB serial connector and used the Dragino RS 485 software this says connected but no response from the sensor, it's obviously wired to the unit but I am unsure this is wired correctly at the sensor end. BTW, the sensor is working fine and transmitting normally. Does anyone have any pointers please? Thanks.

Anna Black

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Jul 31, 2026, 3:42:28 AM (4 days ago) Jul 31

to Dragino-user

I'm not sure exactly what you are seeing, but with a Bluetooth connection you just send the PIN code by itself. I don't think there's any prompt and you just enter the pin number myself - AAA00 or whatever.
It will then properly connect and then you can send AT commands.

Did you know there is an official Dragino BT app called 'devices.tool' ? I didn't realize this at first.