# DIYBMS v4 **URL:** \ **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:** 20\ **Page:** 60
**Author:** ![chmistry](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/c/e47c2d/32.png) [@chmistry](https://community.openenergymonitor.org/u/chmistry)\ **Post date:** [15 April 2020 12:53 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1206 "2020-04-15T12:53:51Z")
Thanks for the reassurance! I stumbled upon that article already, good to know you support it! ---
**Author:** ![rolfbartels](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/r/e0b2c6/32.png) [@rolfbartels](https://community.openenergymonitor.org/u/rolfbartels)\ **Post date:** [15 April 2020 13:25 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1207 "2020-04-15T13:25:13Z")
I know it’s been asked in the past, but I though I’d just ask again to see if there is any traction on implementing an option for a shunt to be integrated into DIYBMS. Adding a shunt not only gives visibility to the charge and discharge currents but also the added protection of over current charge and discharge protection, by monitoring this and allowing a relay to disconnect the bank from the load. ---
**Author:** ![hotear](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/hotear/32/12682_2.png) [@hotear](https://community.openenergymonitor.org/u/hotear)\ **Post date:** [15 April 2020 14:17 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1208 "2020-04-15T14:17:04Z")
![Screenshot from 2020-04-15 15-12-55](https://community.openenergymonitor.org/uploads/default/original/2X/b/b330e2d5ce35ad6b212049f6007d67f1ab256c23.png) I’m finally able to test with bypass mode. In the image you can see 4 cells are red but when I look at the modules only the last 3 (the ones showing temperature of 45 degrees or so) have the red flashing light. Does that mean that one is not working correctly? Looking at the circuit diagram (I only know basic electronics) my guess would be that the pin from the ATTINY to the DUMP\_LOAD\_ENABLE probably is not properly connected? Would that be a good guess? ---
**Author:** ![Rizwan\_Saeed](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/rizwan_saeed/32/13599_2.png) [@Rizwan\_Saeed](https://community.openenergymonitor.org/u/Rizwan_Saeed)\ **Post date:** [15 April 2020 18:33 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1209 "2020-04-15T18:33:26Z")
This is also out of stock Please @stuart suggest any other ---
**Author:** ![hotear](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/hotear/32/12682_2.png) [@hotear](https://community.openenergymonitor.org/u/hotear)\ **Post date:** [15 April 2020 18:46 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1210 "2020-04-15T18:46:52Z")
> [@hotear](#): > > Looking at the circuit diagram (I only know basic electronics) my guess would be that the pin from the ATTINY to the DUMP\_LOAD\_ENABLE probably is not properly connected? Would that be a good guess? I was right 🙂 the pin on the ATTINY was not soldered. Fixed it now and the bypass now works on that module. ---
**Author:** ![juan3211](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/j/ba9def/32.png) [@juan3211](https://community.openenergymonitor.org/u/juan3211)\ **Post date:** [15 April 2020 19:26 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1211 "2020-04-15T19:26:38Z")
Hi, search in this post. I read it all and I can remember that in some place people speak about thermistors. ---
**Author:** ![Rizwan\_Saeed](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/rizwan_saeed/32/13599_2.png) [@Rizwan\_Saeed](https://community.openenergymonitor.org/u/Rizwan_Saeed)\ **Post date:** [15 April 2020 19:28 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1212 "2020-04-15T19:28:18Z")
Already searched the suggested one is also out of stock ---
**Author:** ![juan3211](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/j/ba9def/32.png) [@juan3211](https://community.openenergymonitor.org/u/juan3211)\ **Post date:** [15 April 2020 19:47 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1213 "2020-04-15T19:47:17Z")
Any good smd thermistor 47k will be ok, you can always adjust their “temperature BCoef” in settings (in controller’s created web page), only check the datasheet to ensure that it is the same shape/size, so you could solder in the diyBMS boards ---
**Author:** ![MaartenGoris](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/maartengoris/32/13671_2.png) [@MaartenGoris](https://community.openenergymonitor.org/u/MaartenGoris)\ **Post date:** [15 April 2020 20:04 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1214 "2020-04-15T20:04:19Z")
Arie, Actually i was interested in pre-assembled boards, But so far as i hva read here there still is some manual soldering to do? ---
**Author:** ![chmistry](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/c/e47c2d/32.png) [@chmistry](https://community.openenergymonitor.org/u/chmistry)\ **Post date:** [15 April 2020 21:21 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1215 "2020-04-15T21:21:26Z")
Maarten, see PM ---
**Author:** ![tomash](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/tomash/32/13278_2.png) [@tomash](https://community.openenergymonitor.org/u/tomash)\ **Post date:** [15 April 2020 23:32 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1216 "2020-04-15T23:32:04Z")
Going out of my mind here but has anyone got a link to the exact wemos d1 required? Even Amazon is giving me 100 pages. From 3 for €12.00 to €11.00 each. Thanks in advance. ---
**Author:** ![borpin](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/borpin/32/193_2.png) [@borpin](https://community.openenergymonitor.org/u/borpin)\ **Post date:** [16 April 2020 05:12 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1217 "2020-04-16T05:12:17Z")
> [@tomash](#): > > anyone got a link to the exact wemos d1 required There are so many bad rip offs about I only buy mine direct from China [HOME — WEMOS documentation](https://www.wemos.cc/en/latest/) ---
**Author:** ![Rizwan\_Saeed](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/rizwan_saeed/32/13599_2.png) [@Rizwan\_Saeed](https://community.openenergymonitor.org/u/Rizwan_Saeed)\ **Post date:** [16 April 2020 06:50 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1218 "2020-04-16T06:50:20Z")
> **[1.36￡ 7% OFF|SIMPLE ROBOT】ESP8266 ESP 12 ESP12 WeMos D1 Mini Module Wemos D1...](https://www.aliexpress.com/item/32631693796.html?spm=a2g0s.9042311.0.0.7c3d4c4dwmHhnJ)** > > Smarter Shopping, Better Living! Aliexpress.com Look at this link ---
**Author:** ![borpin](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/borpin/32/193_2.png) [@borpin](https://community.openenergymonitor.org/u/borpin)\ **Post date:** [16 April 2020 08:28 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1219 "2020-04-16T08:28:01Z")
> [@Rizwan\_Saeed](#): > > Look at this link The danger in not getting them from the official Lolin shop is that they are not genuine WEMOS D1s. I suggest the one on that link is not genuine. Use [https://lolin.aliexpress.com/store/1331105](https://lolin.aliexpress.com/store/1331105) ---
**Author:** ![hotear](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/hotear/32/12682_2.png) [@hotear](https://community.openenergymonitor.org/u/hotear)\ **Post date:** [16 April 2020 08:31 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1220 "2020-04-16T08:31:35Z")
@borpin, I get the batteries from a friend in recycling. I got the holders from Ali-Express. Each cell has a positive and negative fuse that blows at about 1.5 amps to a 10mm2 bus bar. The bus bars have lugs at the end so that they can be bolted together to make a full pack. ---
**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:** [16 April 2020 09:01 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1221 "2020-04-16T09:01:48Z")
> [@tomash](#): > > Going out of my mind here but has anyone got a link to the exact wemos d1 required? Its “WEMOS D1 Mini Pro 16M Bytes + ESP8266/D1 Mini Pro Series WiFi Wireless Antenna” Although at the moment any D1 Mini will work. ---
**Author:** ![borpin](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/borpin/32/193_2.png) [@borpin](https://community.openenergymonitor.org/u/borpin)\ **Post date:** [16 April 2020 09:02 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1222 "2020-04-16T09:02:48Z")
> [@hotear](#): > > I get the batteries from a friend in recycling. Useful friend to know… > [@hotear](#): > > Each cell has a positive and negative fuse that blows at about 1.5 amps to a 10mm2 bus bar. Could you do some photos and a bit more detail please? Perhaps start a new thread? ---
**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:** [16 April 2020 10:17 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1223 "2020-04-16T10:17:38Z")
Thermistor part is ``` Manufacturer: Murata Electronics MFR.Part #NCP18WB473J03RB LCSC Part # C86142 Package: 0603 Description: NTC THERMISTORS 1/10W 47KOHMS ±5% 4050K 0603 ROHS ``` [https://jlcpcb.com/parts/componentSearch?searchTxt=NCP18WB473J03RB](https://jlcpcb.com/parts/componentSearch?searchTxt=NCP18WB473J03RB) is showing 970 in stock ---
**Author:** ![hotear](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/hotear/32/12682_2.png) [@hotear](https://community.openenergymonitor.org/u/hotear)\ **Post date:** [16 April 2020 11:08 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1224 "2020-04-16T11:08:03Z")
If I were to connect more than one module to a cell would I be able to bleed of 2x as much power or would they interfere with each other? ---
**Author:** ![tomash](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/tomash/32/13278_2.png) [@tomash](https://community.openenergymonitor.org/u/tomash)\ **Post date:** [16 April 2020 14:52 UTC](https://community.openenergymonitor.org/t/diybms-v4/11292/1225 "2020-04-16T14:52:48Z")
Thanks folks. Ordered from Aliexpress. Onward 🙂 [Previous page](https://community.openenergymonitor.org/t/diybms-v4/11292.md?page=59) [Next page](https://community.openenergymonitor.org/t/diybms-v4/11292.md?page=61)