# IotaWatt Update - nearly complete **URL:** \ **Category:** IoTaWatt\ **Tags:** iotawatt\ **Created:** [3 February 2017 03:25 UTC](https://community.openenergymonitor.org/t/iotawatt-update-nearly-complete/2989 "2017-02-03T03:25:00Z")\ **Posts on this page:** 1\ **Showing post:** 39
**Author:** ![stephen](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/stephen/32/19571_2.png) [@stephen](https://community.openenergymonitor.org/u/stephen)\ **Post date:** [3 April 2017 23:39 UTC](https://community.openenergymonitor.org/t/iotawatt-update-nearly-complete/2989/39 "2017-04-03T23:39:16Z")
Hi bob - was curious why you never used the the built in ADC. ( or maybe you did and did not like the results) i built something similar to yours. only based on the emontx form factor- inter changeable software and hardware from arduino to esp ( wemos d1) the only difference I guess Is i used the onboard ADC to do the voltage calculation and it left a full 8 ADC to stack up to 4 units or what ever number of free CS your board supports.. 32 cts on a esp and 36 ct if used on adruino and enmontx sheild. ( do not have 36 ct so i can not attest to whether it works well with 36 ct s but it will support it \_ I only have 12 cts - but it works fine with those) but yours looks nicer then my hand built ones > [@mcp30XX chip for esp8266 ( wemos D1 adaptor board for emontx shield)](https://community.openenergymonitor.org/t/mcp30xx-chip-for-esp8266-wemos-d1-adaptor-board-for-emontx-shield/3538/9): > > well that’s a pleasant surprise smileythe advantage of the adjust feature I just add in my previous software package . it works nicely to recalibrate for various anomalies. ie: resistors and even crack faulty CTs. I have one emontx sheild that has faulty or wrong size resistor on it from factory that I never got around to changing and it always registered 10% higher then all the other CT ports - was easily corrected using the adjust feature just lower it 10% less then what ever the o… --- _[View the full topic](https://community.openenergymonitor.org/t/iotawatt-update-nearly-complete/2989)._