# CAN bus controller version? **URL:** \ **Category:** diyBMS\ **Created:** [27 December 2020 17:32 UTC](https://community.openenergymonitor.org/t/can-bus-controller-version/16351 "2020-12-27T17:32:18Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![dkb](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/d/5f8ce5/32.png) [@dkb](https://community.openenergymonitor.org/u/dkb)\ **Post date:** [27 December 2020 17:32 UTC](https://community.openenergymonitor.org/t/can-bus-controller-version/16351/1 "2020-12-27T17:32:18Z")
From the [Announcements thread](https://community.openenergymonitor.org/t/diybms-announcements/15515/7) there is a new version of the controller being worked on that supports CAN bus. Was there any updates on when this one might be ready for other users to try out? My system is Victron based and currently using an Orion Jr. BMS but will need a 2nd BMS for another battery bank. Since the Orion Jr. BMS can communicate with the Victron system over CAN bus to reduce current from charge controllers, cut off inverter, etc I was hoping that the new diyBMS would eventually be able to perform similar task over CAN bus as well. Thanks for any updates on the new controller. ---
**Author:** ![stuart](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/stuart/32/16661_2.png) [@stuart](https://community.openenergymonitor.org/u/stuart)\ **Post date:** [28 December 2020 11:27 UTC](https://community.openenergymonitor.org/t/can-bus-controller-version/16351/2 "2020-12-28T11:27:09Z")
Hi @dkb At the moment I’ve not publically released the new controller design as I’m still testing its hardware components/parts. The new code is public (although not usable on existing ESP8266 modules) and this is the state of progress… [[https://github.com/stuartpittaway/diyBMSv4Code/blob/newcontrolleresp32/ESPController/TODOLIST.md](https://github.com/stuartpittaway/diyBMSv4Code/blob/newcontrolleresp32/ESPController/TODOLIST.md)] ### ESP32 BOOT button for WIFI RESET - working GPIO 0 pin connected to interrupt, hold BOOT button on ESP32 for more than 4 seconds to factory reset the WIFI settings stored in EEPROM. Once reset, the LED lights CYAN, at this point reset the controller to enter either the terminal based WIFI configuration (by pressing SPACE bar) or WIFI access point configuration (default). Connect to Wifi SSID DIY\_BMS\_CONTROLLER and IP address 192.168.4.1 to ensure set up pages. ### USB Debugging/Console - working USB Serial is connected to second UART on ESP32 allowing full console access and debug serial port via USB cable. ### WIFI configuration from terminal – working ### TCA9534A – working Controls RGB LED, TFT display LED and AVR ISP reset line ### TCA6408AQPWRQ1 – working Controls relay’s and external IO A/B/C/D/E ### Relay 1 – working Driven from pin 9/P4 of TCA6408AQPWRQ1, confirmed working. ### Relay 2 – not tested Driven from pin 10/P5 of TCA6408AQPWRQ1 ### Relay 3 (SSR)-- not tested Driven from pin 11/P6 of TCA6408AQPWRQ1 ### TX1/RX1 --working Uses GPIO2 for RX and 32 for TX. Works as per ESP8266 modules using hardware based UART. ### I/O ports --working Driven from pin 4/5/6/7/12 (P0/1/2/3/7) of TCA6408AQPWRQ1 ### External 5v power supply input Confirmed working, 3.3v regulator working, reverse polarity protection working Over voltage zener diode (ZMM5V6) not working as expected, incorrectly positioned in circuit diagram (fixed, but not tested in new revision) ### RGB LED Confirmed working, driven from TCA9534A pins 4/5/6 (P0/P1/P2) BLUE, RED, GREEN. ### TFT Screen Confirmed working TFT screen via HSPI interface and LED backlight working driven from TCA9534A pin 7 (P3). ### SD CARD – not tested ### CANBUS – not tested ### RS485 – not tested ### ATTINY ISP Programming – not tested ### SD Card on TFT display – not tested ### TFT Touch Confirmed working via HSPI ### TX2/RX2 Experimental interface for 2nd module chain - not tested ---
**Author:** ![juanma](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/juanma/32/18514_2.png) [@juanma](https://community.openenergymonitor.org/u/juanma)\ **Post date:** [16 July 2021 14:24 UTC](https://community.openenergymonitor.org/t/can-bus-controller-version/16351/3 "2021-07-16T14:24:57Z")
This is an old conversation but I’m hopping that it can get me to the right place. Is there a conversation in regards to the code development for CAN support? I’m in the process of developing my own flavor of what I need from the diyBMS controller but I would like to be as close as possible to any development in the master branch. Thanks.