Hello @rupert
This is correct, I realised we needed more current carrying capacity too late in the design with the RJ11 version. Hence the decision to switch over to RJ45 at the first opportunity with this new manufacturing run. Powering the EmonTx4 via RJ11 is fine as it’s a low power microcontroller. Powering a RaspberryPi is another matter. It’s unfortunate to have to make this change, but it’s for the better longer term.
For those ordering new hardware from the shop we will only have RJ45 emonPi2 units and RJ45 emonVs units going forward. The emonPi2 will replace the emonTx4. It’s worth noting that while it’s not the standard configuration, the emonPi2 measurement board has been designed in such a way that it can actually be used as a direct emonTx4 replacement for those interested in that same radio transmitter and separate base station functionality. So while we are discontinuing the emonTx4 this is only really in name rather than functionality as both the emonPi2 and emonTx4 measurement boards are essentially the same.
For those with an existing emonVs and emonTx4 wanting to add an emonPi2 to their system without buying a new emonVs, we would like to be able to support this. The best solution is probably an RJ11 splitter with one RJ11 going to the existing emonTx4 and another custom RJ11 to RJ45 cable that we would build up here that provides the voltage waveform to the emonPi2. This configuration likely replaces an existing emonBase with an emonPi2 i imagine? and so the USB-C power output cable on the existing emonVs could be plugged into the emonPi2 instead.
Hope that all makes sense?