EmonTx4 Documentation

[borpin (Brian Orpin)]

From recent questions - suggested additions;

emonTX3

• Include details re updating firmware
  • UART to USB (TX/RX)
  • DS v CM firmware
• Connecting via serial to a Pi based device either as a USB or a GPIO connection. Which emonhub interfacer to use.

Connecting emonTx to Pc via USB for metering?

Hi, I posted here about 2 months ago, and have learned a lot since then. Just got hold of a Tx and USB programmer and am immediately clueless again. (previous post here: Newb questions about external dataloggers - #6 by Bill.Thomson) I’m wanting to measure short term power usage for an education program. The room is not internet connected, so my goal is to create a local metering system than I can turn on, discuss, and then turn off. Storage and long term metering is unnecessary. Ideally this…

emonHub ttyUSB0 USB serial adapter

I hope you don’t mind, I moved this question to a new topic. The short answer is yes; you will just need to create a new entry in emonhub.conf in the [interfacers] section, you can edit this via the local Emoncms web interface. There are two options depending on serial format: 1. EmonHubTx3eInterfacer This interface handles name value key pairs e.g. name:value,name:value. This is the default serial output for latest emonTx V3 and emonTH FW. Config example: [interfacers] ### This interface…

This for serial connecting to GPIO pins.

EmonTX to Rpi - Direct Serial Connection

So have the signal and gnd connected as per the photos have tried com_port= /dev/ttyUSB0 in the file emonhub.conf and com_port = /dev/ttyRS485-0 neither seem to work nothing is appearing in the inputs screen any way of fault finding. The TX unit has no lights on it well just one red light on start up for a 5 seconds.

Various bits in this thread including building firmware on the Pi and uploading it directly. This was my final setup

EmonTX to Rpi - Direct Serial Connection

So the final step on my odyssey (possibly) [2020-06-03 20.09.07] 3D printed case (link above), a right angle header and a short cable made up with a crimp tool makes for a very clean setup. Pi is then powered off the 5V DC to the emonTX (it works the other way as well). End cost is slightly more than the emonESP, but far more flexible, can update firmware and no need for emoncms on a second machine/Pi. My aim is to install this at a friend’s house for a month and see if Agile will save him m…