# 3 phase - 3 wire monitor using ESP32

**URL:** <https://community.openenergymonitor.org/t/3-phase-3-wire-monitor-using-esp32/21493>\
**Category:** Hardware\
**Tags:** emonlib\
**Created:** [30 August 2022 12:53 UTC](https://community.openenergymonitor.org/t/3-phase-3-wire-monitor-using-esp32/21493 "2022-08-30T12:53:53Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![Robert.Wall](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/robert.wall/32/38246_2.png) [@Robert.Wall](https://community.openenergymonitor.org/u/Robert.Wall)\
**Post date:** [1 September 2022 12:39 UTC](https://community.openenergymonitor.org/t/3-phase-3-wire-monitor-using-esp32/21493/6 "2022-09-01T12:39:41Z")

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Have you tried searching the forum? Did you not find this?

> [@Update to 3-Phase PLL sketch](https://community.openenergymonitor.org/t/update-to-3-phase-pll-sketch/8610):
>
> Continuing the discussion from [Arduino IDE problem](https://community.openenergymonitor.org/t/arduino-ide-problem/8597/13): It appears that version 1.8.7 of the Arduino IDE requires a definition of the showString( ) function to be placed in the main sketch. This problem manifested itself in the linked thread, which concerns the 3-phase PLL sketch. An updated version of the sketch is here: [emonTx\_3Phase\_4wire\_PLL\_V1.3.zip](https://community.openenergymonitor.org/uploads/default/original/2X/4/4e44b27d12d7929b9eef54352dfa894a1ac0e797.zip) (148.2 KB) This version is now obsolete – see [post no.21](https://community.openenergymonitor.org/t/update-to-3-phase-pll-sketch/8610/22) below. MD5 Hashes: emonTx\_3Phase\_4wire\_PLL\_V1.3.zip 37fb18eb9fdccaa4585a976ee57c1…

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