# DIYBMS v4

**URL:** <https://community.openenergymonitor.org/t/diybms-v4/11292>\
**Category:** diyBMS\
**Tags:** bms, diybms, battery\
**Created:** [30 June 2019 09:06 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292 "2019-06-30T09:06:01Z")\
**Posts on this page:** 1\
**Showing post:** 3081

<div class="post-metadata">

**Author:** ![voltmeter](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/v/9de053/32.png) [@voltmeter](https://community.openenergymonitor.org/u/voltmeter)\
**Post date:** [11 January 2021 16:02 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/3081 "2021-01-11T16:02:17Z")

</div>

> [@DIYBMS Announcements](https://community.openenergymonitor.org/t/diybms-announcements/15515/7):
>
> Just a quick update on progress that I’m making behind the scenes. The below board is a prototype design for a new controller module using the ESP32. The board has hardware for: Two mechanical relays (5A, 60V) One 0.5A, 60V SSR relay (on board) An ATTINY/Arduino ISP programming header (so the controller can program the modules without needing PlatformIO or a computer/USBASP interface) RS485 CANBUS Four additional I/O pins Two connectors for connecting the existing modules to A colour TFT scr…

---

_[View the full topic](https://community.openenergymonitor.org/t/diybms-v4/11292)._