Setup 3-phase emonTX with emonESP using emoncms.org

Hardware emonTx
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Thanks lots for the reply Robert, with a little bit of additional research it solved my issue.
If someone got the same issue, i want to keep my documentation for this issue here:

use case: 3 phase, 4 wire, 230V, country:Austria, use of emonTX with emonESP and emoncms.org (without emonPi or emonBase)

emonTX

  1. Download Firmware for emonTx V3.4.x GitHub - openenergymonitor/emontx3: EmonTx V3.4.x Hardware and older discreet firmware, see EmonTxV3CM repo for latest
  2. Download emonTx V3 3-phase Firmware https://github.com/openenergymonitor/emontx-
  3. Download and install platformIO Atom (see “Firmware Modification” Firmware Modification - Guide | OpenEnergyMonitor)
    3.1 Install “platformio-ide” Package
    3.2 then I had to remove the c:\Users\Username.platformio\penv Directory and restart platformIO
    3.3 I also had to check and uncheck “Use built-in Platform IO Core” within the platformio-ide package settings in platformIO
  4. “Open Project” in platformIO, point to directory “firmware” of the previously downloaded Firmware for emonTx
    4.1 Remove files from src directory
  5. Move files from previously downloaded “emonTx V3 3-phase Firmware” to the empty “src” folder of the project created
  6. Edit file emonTx_3Phase_PLL.ino
    6.1 change “#define RFM69CW” to “#define EMONESP”
    6.2 consider my installation in Austria, one also changes “double vCal = 268.97” to value 260
    6.3 make sure occurence of “Serial.begin(” has value 9600 (necessary due to use of 3phase with emonESP)
  7. Build the project, connect the emonTX via “UART to USB programmer” and “Upload”

emonESP

  1. Download firmware for emonESP GitHub - openenergymonitor/EmonESP: ESP8266 WIFI serial to emoncms link
  2. Open Project in platformIO IDE, use folder EmonESP-master from previous download
  3. Edit file src.ino, change ocurrences of “Serial.begin(115200” to value 9600 - matching the setting from the emonTX
  4. Edit file platformio.ini, change -DWIFI_LED=0 to value 2 (0=rst!) (EmonESP keeps rebooting)
  5. Following the guide GitHub - openenergymonitor/EmonESP: ESP8266 WIFI serial to emoncms link
    5.1 connect the emonESP via UART to USB progammer
    5.2 Upload src via command “pio run -t upload”
    5.3 Upload spiffs via command “pio run -t uploadfs”

(
I dont know if the following was really necessary in my case, since the recurring reboot problem of the emonESP was solved following 4.)(DWIFI_LED=2)
Anyhow, if reboots persist, try to erase all flash memory following the guide GitHub - openenergymonitor/EmonESP: ESP8266 WIFI serial to emoncms link. “esptool.py write_flash 0x000000 blank_1MB.bin 0x100000 blank_1MB.bin 0x200000 blank_1MB.bin 0x300000 blank_1MB.bin”. Use “esptool” (GitHub - espressif/esptool: Espressif SoC serial bootloader utility), satisfy depenence “pyserial”(pyserial for Python 2.7.2 - Stack Overflow
)

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