Getting the timings from other batteries

[KodeZ]

I need to send the Stiga signal for SC 48 AE, which is basically the same as this Greenworks model:
https://greenworkstools.eu/no/en/garden/cutting/chainsaws/gd40cs40
(not entirely sure that the battery voltages match perfect, but the battery fits perfect, that is for sure. Stiga seems to claim actual 48V)

It turns on and runs for 4-5 seconds, then start beeping and shuts off. I saw another guy pulling a pin in an inverter low to avoid the battery verification part, but this has the PCB completely covered in glue so I cannot do that. I am hoping to bootstrap the tool using this magnificent code.

My questions are as follows:

1. How do I hook up the battery to see the signal coming from it so I can read it out? I suspect I would pull one of the middle pins low or high, then get a signal on the other pin compared to ground, but fearing damaging something I would love input here.

[softwarecrash]

hey,
simple get ground and the signal connector from the battery, you need a logik analyzer or osziloskope to do that. when you wake the orginal battery it start sending data, when not connect a little load to it

[KodeZ]

Oh, I just realized that I must have deleted one of the questions.
So basically, put a bit of load on the battery, say a 100 OHM resistor or something like that, and it should start transmitting? I will test that on the greenworks battery, very good, thanks! I was thinking it would start if one of the two "signal" leads was pulled low or high.
Second question was, how would you electrically connect the 40V->5V buck converter with the arduino and the output signal, given the four connectors on the battery.

[softwarecrash]

the buck connect to the 40v line, the data line is 5V by greenworks.

yes, put a load on the battery and his start talking, or wake it up by pressing the charge state button

[KodeZ]

Is one of the two signal connectors really just a ground cable connected to the negative on the battery?
Dude, what a response time you operate with! Much appreciated.

[softwarecrash]

i know only the greenworks (and forks) batterys, this have only 3 real contacts, the 20/40/80V-VCC and GND, the third is the "omega" port, so some batterys have one more, that is just a NTC port

[RandoMan70]

Hi there, there is my capture of full exchange sequence from the beginning. My tool is 40V snow thrower (2600607), batt is 5ah (2927207)
Battery starts transmitting when a tool is rising Ohm line up, initially it passes 5 different signals in 100ms interval, then starts transmitting one sequence until a tool release the line. Not sure how long it will cycle this, may be it will periodically retransmit whole greeting sequence (say, for older devices).

Initial sync pulse length: 397us (marked as S below)
Long pulse length: 198us (marked as 1 below)
Short pulse length: 94us (marked as 0 below)

Initial sequence

Q means query from battery side
R means tool response
1. nearly +700ms from line is up
  Q: S 0 x 24
  R:   0 x 15
2. +800 ms  
  Q S 0 x 24
  R   1 0 1 1 0 1 0 0 0 1 0 0 1 0 1 1
3. +900 ms
  Q S 1 0 1 0 0 0 0 0 0 1 0 1 0 0 0 0 1 1 1 1 0 0 0 0
  R   1 0 1 1 0 1 0 0 0 1 0 0 1 0 1 1
4. +1000 ms
  Q S 0 1 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0
  R   1 0 1 1 0 1 0 0 0 1 0 0 1 0 1 1
5. +1100 ms
  Q S 0 0 1 1 0 0 0 0 1 0 1 1 0 1 0 0 1 0 0 1 1 1 0 0
  R   1 0 1 1 0 1 0 0 0 1 0 0 1 0 1 1

Note: Surprisingly, first response is really only 15 bits. All further are 16 bits length

Continuous mode

6. +1300ms
  Q S 1 1 1 0 0 0 0 0 1 1 1 0 1 0 0 0 0 1 1 1 1 0 0 0
  R   1 0 1 1 0 1 0 0 0 1 0 0 1 0 1 1
7. +1500ms
  Q S 1 1 1 0 0 0 0 0 1 1 1 0 1 0 0 0 0 1 1 1 1 0 0 0
  R   1 0 1 1 0 1 0 0 0 1 0 0 1 0 1 1
... etc

Grabbing tool is instrustar's cheap USB-oscilloscope, I have .osc files recorded is someone needs it.

I going to simulate this sequence soon using arduino and I'll share the code if it works.

[RandoMan70]

Code is shared here https://www.eevblog.com/forum/reviews/greenworks-60v-battery-ohm-terminal/msg5281534/#msg5281534
Works for me.

[q9104]

嘿， 简单的获取地面和电池中的信号连接器，您需要Logik Analyzer或Osziloskope来做到这一点。唤醒原始电池时，它会开始发送数据，当不连接一些负载时

Bitte fügen Sie die bekannten Greenworks-Timing-Informationen in die Datei timings.h ein. Dort habe ich keine 80v und 82v gefunden.

Please add the Greenworks timing information you know to the timings.h file, I didn't see 80v and 82v in it.

[q9104]

我知道只有绿色工厂（和叉子）酒杯，只有3个真实的联系人，20/40/80/80V-VCC和GND，第三个是“ omega”端口，所以有些电池还有一个，只是一个NTC端口
Please ensure that the Greenworks timing update is complete, thank you

[q9104]

Code is shared here https://www.eevblog.com/forum/reviews/greenworks-60v-battery-ohm-terminal/msg5281534/#msg5281534代码在此处分享 https://www.eevblog.com/forum/reviews/greenworks-60v-battery-ohm-terminal/msg5281534/#msg5281534 Works for me.  对我来说它可行。

The code is not working for my Greenworks 40v model J18 cordless chainsaw, it stops rotating after 3 seconds. Do you have the latest code to match it? If so, can you share it with me?

[Deos327]

Hi. What pins of Arduino are you using to send signal to the device controller?

[Deos327]

Can you make a pic oh the connection?