EmonTX to Rpi - Direct Serial Connection

[Robert.Wall]

@Sage-Energy

Just noticed in the emonhub log that it claims to be receiving the [SerialTx3e] data from “Node : 0”, despite the fact that the EEPROM and firmware Node are both set to 11… what’s that all about?

That’s because it doesn’t send the NodeID. So you need an extra line in emonhub.conf to give it a node number - or write a definition for Node 0. Just don’t ask me to explain why.

I want to go and cook my tea, meantime here’s my cryptic crib that might explain a little:

EmonESP

GitHub - openenergymonitor/EmonESP: ESP8266 WIFI serial to emoncms link

also

Using the EmonTx v3 with the ESP8266 Huzzah WIFI module

Following on from the forum post here ESP8266 Wifi Developments. This is a brief guide on how to use the Adafruit ESP8266 Huzzah WIFI breakout module with an EmonTx v3 to make a simple WIFI enabled energy monitor that posts to a remote emoncms server such as emoncms.org. Note: this is an ongoing development project, but is a useful option in its present form [image] In the future, we may integrate the ESP8266 module directly on the EmonTx PCB. For now, the ESP8266 Huzzah module provides a go…

NodeOffset: So when the emonhub interfacer was written for that emonESP format serial output with no node id (aka node id is None) we could use the nodeoffset to add a “offset” to that absent node id ie your node is currently 0 offset by 1 = 1. So using nodeoffset is how you define the node id for each emonTx using the (emonesp format) serial output.

Under this section
[[RFM2Pi]]
Type = EmonHubJeeInterfacer

you need to add under runtimesettings

  [[[runtimesettings]]]
       nodeoffset = 17

An offset of 0 (default) + 17 = 17.