DIY RS485 wifi ESP 8266 Adaptor Part 1 - Flashing and software

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Sorry guys this ended super long so I've split it up into sections, shall upload the rest over the next few days. The wifi monitor/adaptor is working great on both my EPSolar models which are LS1024B and Tracer-3210A.
I'm looking to expand the channel as quickly as possible so have set up a patreon account, channel is small i know but any pledges will massively help.
/ chickey
Manual and software download
www.epsolarpv.c...
ESP-Link downloads
github.com/jee...
NodeMCU firmware
github.com/nod...
Purchase links
USB to RS485 www.ebay.co.uk/...
UART to RS485 www.ebay.co.uk/...
3.3v step down www.ebay.co.uk/...
Epever Tracer3210A www.ebay.co.uk/...

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5 окт 2024

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Комментарии : 39

@AdamWelchUK 8 лет назад

I'll definitely be building one of these. Thanks for the detailed explanation... On to part 2 now for me.

@Chickey 8 лет назад

Cheers Adam i'm really happy with it and it's been pretty reliable so far. I struggled with the video editing though as it ended up being a long process to build/setup software, need to work on my editing skills! On the hardware i need to look at running the UART at 3.3v again as the RS485->UART will be giving 5v signals to the 8266 which is too high really so might shorten the life. Could just thrown in a level adapter.

@AdamWelchUK 8 лет назад

I think the ESP8266 is tolerant to slightly higher voltages to 3.3. Andreas Spiess was recently using them at 3.6 volts on LiFePo4's - perhaps that little additional voltage would help the RS485 to UART be more reliable? I've got a few MAX485s in my modules box (think I got five for just over £1) I might try to get one of those working first - a shared ground will probably help with the communication as I think you pointed out. I've almost stopped filming me building things - I just stop every so often and talk a little about where I've got to. Seems to make the video flow a little better and the editing a lot easier! Do your own thing though - I enjoyed all three videos.

@Chickey 8 лет назад

I'll try the stopping every so often method as doing it the other way seems to lengthen things out a lot as you feel the need to narrate and try to keep things in shot. Going for a midpoint voltage wise could be a good idea, i saw andreas video too, could use the variable DC-DC adapter and drop the 5v to 3.6 and power both the RS485 to uart and ESP8266. I'd be interested to see how you get on with the MAX485, i could have done it with an arduino i think as you'd have to do software RS232/Serial but i choose the quick/easy option of the ESP-link firmware and the slightly more expensive RS485->UART adaptor but it was far simpler with zero coding too :-)

@БоянИванов-щ6ш 7 лет назад

wiring diagram?

@jamest.5001 4 года назад

I have a couple of these, I have a A and a AN , 30amp tracer A, and 40 amp tracer AN . I like them, but either need a few more, or a higher current controller, for about 3-4kw total, keeping the ones I have in service, it seems the 30 amp are priced cheaper per amp, I got the 40 amp at a deal kinda pre sale, I'm thinking about 4 more 30 or 40 amp, or a few 60 amp controllers,

@SerhiiBykov 10 дней назад

@Chickey Hello! I'm tring to connect RS485-to-WiFi to my Solar Inverter Must but without success. Could you please explain, in this first video you 06:05 minutes you said that without GND connection to Epever you construction (USB-TTL + TTL-RS485) doesnt work ? If so, how could be working your USB-RS485 stick that has only A/B pins ? Where USB-RS485 converter took GND for work, from USB ? Then GND from USB and GND rom Epeve should be the same ?

@CJ-ew8df 5 лет назад

Do you have a Paypal page so I can buy you a beer? Just finished building mine... such a simple design and works really work! Thanks for sharing

@Chickey 5 лет назад

Really great to hear it's working for others :-) Appreciate the beer offer but knowing it's working for you is enough :-)

@LeProfesSolaire 3 года назад

Hi, can it communicate avec Home Assistant ? With ESPhome ? I have an Esmart3 and I would like to integrate datas, do you know how can i do ?

@Chickey 3 года назад

Hi sorry i have not used esmart3

@wrybread 7 лет назад

Very cool project. I did something similar in my camper with my Tracer 4210a, I made the cable using the USB to RS485 and connected that to a Raspberry Pi, and made a little Python script that reads the data from the charge controller and makes it available on my network. It works great, and it lets me switch my camper's refrigerator over to electric power when the battery is fully charged and the sun is out, which has saved me a lot of propane. But I've found that the Tracer 4210a randomly stops responding over modbus for hours at a time. I haven't been able to find a pattern to it, but I've now tried two different 4210a units, and two different cables (different ethernet cables and different RS485 adaptors), and same issue. It's maddening, and is nearly a dealbreaker. Have you noticed any issue like that in your project?

@Chickey 7 лет назад

Really sorry for the long delay, missed a lot of comments on some of my earlier video's. I've been lucky in that both my charge controllers are responding ok consistently for the RS485 connections, i've been logging a lot from them lately and they have been pretty reliable. Are you still experiencing the issue?

@wrybread 7 лет назад

Nope, all fixed now. The secret was 1) ground the Tracer to my Pi, and also to ground my inverter. Since doing that 100% reliable, phew. And my fridge is happily running off solar for about half the day.

@mhoffeck 5 лет назад

I have now also flashed an esp8266 without any problems but after that no wifi access point appears. Any idea of what went wrong?

@xenofonlive 7 лет назад

Hi! can i charge lithium batteries with this charger? i have some batteries lipo 3.7v per cell 3S15AH, 6S22AH, and 4 batteries lifepo4 33AH , 4S 3.2v per cell

@Chickey 7 лет назад

I'm using the charge controller for lithium cells in a 7s configuration. It shall however not take into account the voltage of each cell etc so it's not ideally suited.

@mohitsingh5665 5 лет назад

That clean cut is actually a kind of psychological disorder

@Chickey 5 лет назад

No idea what you mean but thanks for watching one of my earlier videos.

@mohitsingh5665 5 лет назад

@@Chickey lol....I also make sure pcb should be accurately cut for my diy projects and that takes lots of unnecessary time but I heard it is Obsessive-compulsive disorder

@AndrewWalsh43 5 лет назад

will this work with the latest esplink v 3.0.1 software ?

@MrSkyshine 5 лет назад

Does this work with the AN series?? Some say the old mt5p doesn't work with the an series... so I am assuming this won't work with it?

@Chickey 5 лет назад

I have heard mixed results, i know Adam Welch had no luck but others have messaged to say it worked for them. Sorry i don't have an AN device to test with.

@Yosupra 2 года назад

Didnt work

@kenlee6018 7 лет назад

Hi, which folder under github.com/nodemcu/nodemcu-fi... can I get bin files? Thank you.

@Chickey 7 лет назад

hi Ken, i would use the ESP-Link as that is what i ended up using in the video.

@MrSensible1 7 лет назад

I found the only way to get my esp8266 into bootloader mode was to short GPIO to ground as you power it up and not after. I used one of these to program it with the orientation of the esp with the antenna towards the usb plug. www.ebay.co.uk/itm/191874511536?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT Also the wiring for the esp to the TTL to RS485 converter is Rx to Rx, Tx to Tx and not Rx to Tx and vice versa.

@Chickey 7 лет назад

Yup i do the same regarding the grounding, i use a small programming board and short GPIO0 then perform a power reset and release the short on GPIO0 after it has powered up.

@MrSensible1 7 лет назад

Aye thanks It just wasn't that obvious at first and I incorrectly connected Rx to Tx so couldn't get it working for a while. All good now though so thanks for your vids.