Axpert King and VMIII have got built in Bluetooth converter inside. But I dont know if BT converter inject/receive data after o before optocouplers.coulomb wrote: ↑Thu, 18 Jun 2020, 10:36That should be fine, though I wonder at the effects of tiny capacitances to earth on Radio Frequency receivers.Tejota wrote: ↑Wed, 17 Jun 2020, 22:11Is there any possibility to directly attack the UART of the control board without going through the communication board??
I am referring to converters of the DT-06 or HC-08 type powering directly from the 5V of the control board. With these converters the isolation is total since it is wifi or bluetooth to TTL level.
Ground CAT6 wire on RJ45 is in the connector housing but this ground is not digital ground from converter USRIOT.coulomb wrote: ↑Thu, 18 Jun 2020, 10:36Tejota wrote: ↑Wed, 17 Jun 2020, 22:11The "UART on the control board" is inside the DSP itself. [ Edit: Therefore, if you cause any problems, it's not going to be an easy chip to replace. ] I assume that CAT-5 cable is non-isolated from both the transmitter and the receiver, but I've never looked into that. Even if they are isolated by a tiny toroidal transformer, it's not clear to me that they can withstand hundreds of volts continuously, or that they will be immune to the presumably somewhat spiky voltages with respect to earth. So these I would not use or even experiment with.Even with tcpip-ttl converters like this and powered from the 5V's on the control board I think the digital ground isolation would be respected since the rj45 tcpip connector pins are never grounded.
Any problems using these converters directly to the UART on the control board??
RJ45 TCPIP conector pinouts havent got any digital ground.
Anyway, I think to incorporate these converters, the most secure procedure is to use optocouplers and power supply from comm board.