Hi.

As you know, I posted all the 722.6 CAN messages to another issue on here. I would like to ask if you are up for collaborating on a more modern drop in replacement TCU for the 203-204 series vehicles (Basically anything with a 722.6 from 2001 to 2011).

I had some ideas on how to update your codebase for CAN compatibility, but it will also require PCB modifications to allow for CAN C Tx/Rx support.

I also wish to add adaptive learning based on a simple neural network that can run on the Teensy 4 board, and allow it to be trained in pure manual mode (M), the apply the learned values in both Sport, Comfort, or Agility mode (A is supported on all 722.6 transmissions, but it was only implemented on the 204 chassis). Due to it being on CANBUS, its possible to take into consideration a lot more sensors on the car before determining if it should shift. Just some of whats avaliable on CANBUS below:

1. Individual wheel RPM (all 4)
2. Steering wheel angle (Driver input)
3. Steering wheel angle (Wheel output)
4. Boost pressure
   5 .Engine torque production (Nm)
5. ESP / ABS actuation values

In regards to determining shift pressure. I can make that user configurable in each mode (S/C/A), in fact i plan to enable configuration over CANBUS for my Headunit project, allowing me to adjust shift parameters from a touch screen within the car.

I've also updated the CAN messages below with data extracted from my MercedesUI project (Custom infotainment system for older mercs)...This contains additional parsed values for enum based data:
7226_can.txt

Hi all! Anyone try it on Arduino mega? I thought I make a full smd board with atmega2560. Anyone have pins.h for arduino mega? And how well it is run on mega or i need teensy?

The schematic needs to be updated to to reflect the rev K board. The BOM is different for this revision and does not match the schematic.

I’m trying to use a 7 pin SPI OLED. Could somebody please clarify the pin function for ‘DISPLAY 1’ to ‘DISPLAY 5’? Clk, MOSI, DC etc.

I’ve looked at the U8G2 stuff but fear I’m just going round and round in circles. Should the display boot as soon as power is applied to the board.

I’m a relative noob when it comes to the code.

Thank you in advance.

• test how well controller works when different parts are disabled in config.cpp
• remove unnecessary modularity

jssc need change to 2.9.4 under windows 10
jssc 2.9.4 Under win10 work fine

On lib/jssc-2.8.0-arduino4.jar open port

Problematic frame:

C [jSSC-2.8_x86_64.dll+0xb5db]

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j jssc.SerialNativeInterface.openPort(Ljava/lang/String;Z)J+0
j jssc.SerialPort.openPort()Z+65
j util.Serial.init(Ljava/lang/String;IIIC)V+95
j util.Serial.(Ljava/lang/String;I)V+26

• compare speed differences in RPM-vehicleSpeed and or differential sensor-vehicleSpeed to determine whether vehicleSpeed is accurate.
• if not, or no speed data available, disable automatic shifting.

Idea is to create simple test mode for controller to see if wiring is alright.

• test sensors / solenoids / actuators (test that tps is in range, if not, calibrate it etc.)
• display test / align (support for different displays people might have)

I found these ID's from a python script I wrote to decompile data found in Xentry:
https://github.com/rnd-ash/W203-canbus/blob/master/DAT_TRANSLATOR/parse_dat.py

These ID's are broadcast on CANBUS C - The ECU name is just the name of the message in Xentry, but they all come from the GS controller (AKA TCU) - Original text was in German so most of it has been translated :)

The offset and len in the messages are viewed from a big endian position within the can frame, where 0 is byte 0 and 64 is the 8th bit in the 8th byte

ECU NAME: GS_218h, ID: 0x0218. MSG COUNT: 31
MSG NAME: MTGL_EGS - Motormomentenanf. Toggle 40ms +-10, OFFSET 0, LENGTH 1
MSG NAME: MMIN_EGS - Engine torque requirment Min, OFFSET 1, LENGTH 1
MSG NAME: MMAX_EGS - Engine torque requirment Max, OFFSET 2, LENGTH 1
MSG NAME: M_EGS - Current engine torque, OFFSET 3, LENGTH 13
MSG NAME: GZC - Target gear, OFFSET 16, LENGTH 4
MSG NAME: GIC -Current gear, OFFSET 20, LENGTH 4
MSG NAME: K_S_B - torque converter slipping, OFFSET 24, LENGTH 1
MSG NAME: K_O_B - torque converter open, OFFSET 25, LENGTH 1
MSG NAME: K_G_B - torque converter closed, OFFSET 26, LENGTH 1
MSG NAME: G_G - off road gear, OFFSET 27, LENGTH 1
MSG NAME: GSP_OK - gear shift program o.k., OFFSET 28, LENGTH 1
MSG NAME: FW_HOCH - Driving resistance too high, OFFSET 29, LENGTH 1
MSG NAME: SCHALT - Schaltung, OFFSET 30, LENGTH 1
MSG NAME: HSM - Manual shift mode active, OFFSET 31, LENGTH 1
MSG NAME: GET_OK - Transmission ok, OFFSET 32, LENGTH 1
MSG NAME: KS - Knallstart, OFFSET 33, LENGTH 1
MSG NAME: ALF - start enabled, OFFSET 34, LENGTH 1
MSG NAME: GS_NOTL - Gearbox in limp home mode, OFFSET 35, LENGTH 1
MSG NAME: UEHITZ_GET - Gearbox overheating, OFFSET 36, LENGTH 1
MSG NAME: KD - Kickdown, OFFSET 37, LENGTH 1
MSG NAME: FPC_AAD - Driving program for AAD, OFFSET 38, LENGTH 2
MSG NAME: MPAR_EGS - Motor torque request parity (even parity) OFFSET 40, LENGTH 1
MSG NAME: DYN1_EGS - Engagement mode / drive torque control, OFFSET 41, LENGTH 1
MSG NAME: DYN0_AMR_EGS - Engagement mode / drive torque control OFFSET 42, LENGTH 1
MSG NAME: K_LSTFR - Torque converter lockup free of load, OFFSET 45, LENGTH 1
MSG NAME: MOT_NAUS_CNF - Confirm bit OFFSET 46, LENGTH 1
MSG NAME: MOT_NAUS - Engine emergency stop, OFFSET 47, LENGTH 1
MSG NAME: MKRIECH - creep torque (FF for EGS + CVT), OFFSET 48, LENGTH 8
MSG NAME: FEHLPRF_ST - Status error check, OFFSET 56, LENGTH 2
MSG NAME: CALID_CVN_AKT - CALID/CVN transmission active OFFSET 58, LENGTH 1
MSG NAME: FEHLER - Error number counter, OFFSET 59, LENGTH 5

ECU NAME: GS_338h, ID: 0x0338. MSG COUNT: 2
MSG NAME: NAB - Gearbox output speed (only 463/461, otherwise FFFF), OFFSET 0, LENGTH 16
MSG NAME: NTURBINE - Turbine speed (NAG1/NAG2 only), OFFSET 48, LENGTH 16

ECU NAME: GS_418h, ID: 0x0418. MSG COUNT: 17
MSG NAME: FSC - Driving position, OFFSET 0, LENGTH 8
MSG NAME: FPC - Driving program, OFFSET 8, LENGTH 8
MSG NAME: T_GET - Gearbox oil tempurature, OFFSET 16, LENGTH 8
MSG NAME: ALLRAD - All wheel drive?, OFFSET 24, LENGTH 1
MSG NAME: FRONT - Front wheel drive [1], Rear wheel drive [0], OFFSET 25, LENGTH 1
MSG NAME: SCHALT - Schaltung, OFFSET 26, LENGTH 1
MSG NAME: CVT - Stepless gears[1], Stepped gear [0], OFFSET 27, LENGTH 1
MSG NAME: MECH - Gear mechanism varient, OFFSET 28, LENGTH 2
MSG NAME: ESV_BRE - Apply brake when switched on, OFFSET 30, LENGTH 1
MSG NAME: KD - Kickdown, OFFSET 31, LENGTH 1
MSG NAME: GZC - Target gear, OFFSET 32, LENGTH 4
MSG NAME: GIC - Actual gear, OFFSET 36, LENGTH 4
MSG NAME: M_VERL - Torque loss, OFFSET 40, LENGTH 8
MSG NAME: FMRADPAR - wheel torque (even parity), OFFSET 48, LENGTH 1
MSG NAME: FMRADTGL - Factor wheel torque toggle 40ms + -10, OFFSET 49, LENGTH 1
MSG NAME: WHST - Gear selector lever posititon (NAG, KSG, CVT), OFFSET 50, LENGTH 3
MSG NAME: FMRAD - Wheel torque factor (FF for KSG), OFFSET 53, LENGTH 11

We've built one of these controllers (rev.K) and installed it in a '98 E300TD with the old-style shifter. It seems to be somewhat functioning, however we are facing an issue where if you shift say from 1st gear through 4th in manual-mode, let it sit for a while and then try to shift, suddenly the controller thinks it is in 1st gear all of a sudden. Got any pointers on what could be wrong here, some sensor input or? Surely something has to be ways off?

Hi,can you upload your necessary library folder for that code? I have problem with compiling with last version of Arduino IDE.

Could somebody please share close up photos of assembled rev k board.
Finished mine yesterday, only half powered up, I have a dead short somewhere although I currently can’t find it. Would like to check component polarity against a working board before I decide it’s the PCB. Thanks!

As the teensy 3.5 is end of life, are there known working alternatives?

Arduino:1.8.16 (Mac OS X), TD: 1.55, Płytka:"Teensy 3.5, Serial, 120 MHz, Faster, US English"

/private/var/folders/zj/vq9z9vvx4r7fwmdkt_43ng6w0000gn/T/AppTranslocation/675F2C8C-30CE-4822-B6C4-8DD2C2BAAA7E/d/Teensyduino.app/Contents/Java/hardware/teensy/avr/libraries/TeensyThreads/TeensyThreads.cpp:29:25: fatal error: utils/debug.h: No such file or directory
compilation terminated.
Błąd kompilacji dla płytki Teensy 3.5.

All libraries installed:

Użycie biblioteki SoftTimer w wersji 3.1.3 z folderu: /Users/michalgrabinski/Documents/Arduino/libraries/SoftTimer
Użycie biblioteki EEPROM w wersji 2.0 z folderu: /private/var/folders/zj/vq9z9vvx4r7fwmdkt_43ng6w0000gn/T/AppTranslocation/675F2C8C-30CE-4822-B6C4-8DD2C2BAAA7E/d/Teensyduino.app/Contents/Java/hardware/teensy/avr/libraries/EEPROM
Użycie biblioteki SPI w wersji 1.0 z folderu: /private/var/folders/zj/vq9z9vvx4r7fwmdkt_43ng6w0000gn/T/AppTranslocation/675F2C8C-30CE-4822-B6C4-8DD2C2BAAA7E/d/Teensyduino.app/Contents/Java/hardware/teensy/avr/libraries/SPI
Użycie biblioteki U8g2 w wersji 2.31.2 z folderu: /Users/michalgrabinski/Documents/Arduino/libraries/U8g2
Użycie biblioteki AutoPID w wersji 1.0.3 z folderu: /Users/michalgrabinski/Documents/Arduino/libraries/AutoPID
Użycie biblioteki IFCT-master z folderu /Users/michalgrabinski/Documents/Arduino/libraries/IFCT-master (legacy)
Użycie biblioteki Adafruit_MAX31855_library w wersji 1.3.0 z folderu: /Users/michalgrabinski/Documents/Arduino/libraries/Adafruit_MAX31855_library
Użycie biblioteki Adafruit_BusIO w wersji 1.9.3 z folderu: /Users/michalgrabinski/Documents/Arduino/libraries/Adafruit_BusIO
Użycie biblioteki Filters-master z folderu /Users/michalgrabinski/Documents/Arduino/libraries/Filters-master (legacy)
Użycie biblioteki PciManager w wersji 2.1.4 z folderu: /Users/michalgrabinski/Documents/Arduino/libraries/PciManager
Użycie biblioteki Wire w wersji 1.0 z folderu: /private/var/folders/zj/vq9z9vvx4r7fwmdkt_43ng6w0000gn/T/AppTranslocation/675F2C8C-30CE-4822-B6C4-8DD2C2BAAA7E/d/Teensyduino.app/Contents/Java/hardware/teensy/avr/libraries/Wire
Użycie biblioteki TeensyThreads w wersji 1.0.1 z folderu: /private/var/folders/zj/vq9z9vvx4r7fwmdkt_43ng6w0000gn/T/AppTranslocation/675F2C8C-30CE-4822-B6C4-8DD2C2BAAA7E/d/Teensyduino.app/Contents/Java/hardware/teensy/avr/libraries/TeensyThreads

I am interested in building one of these. I am hardly a coder, I can definitely assemble a PCB and flash microcontrollers. I read that you are looking for someone to write instructions. I think this is something I could do well. Is there a group chat where we can communicate more quickly? I often use Discord for things like this, but would readily adopt another platform.

One of my interests for my 1995 E300D (aside from ditching the 722.4) is implementing a VGT boost controller using a vacuum controlled VGT from the OM648. I do wonder if this controller could operate a purge flow solenoid to modulate the vacuum signal to the VGT actuator.

Hello Markus,

May I ask You, if You know how to read the gear number, lock-up state and gearbox oil temperature from the CAN (preferably through OBDII)?
I am using Jeep WG with this gearbox for around 3 years now, and since beginning I have idea to prepare Arduino based indicator of these values.
I was trying unsuccessfully to sniff messages and analyze them, and when i lost my hope, there appeared new version of JeepDiagPro, that was showing these values.
I know from Krzysztof Dymaniuk, that it wasn't so far in the scope of Your engineering, but perhaps as You already have all needed facilities it would be easier for You to investigate it?
I'd really appreciate if You can share anything substantial, as this fight with obsession i feel i am loosing slowly... :-)

Hi
I have few remark.
IRF540 need Vgs = ~10V to full open
to drive transistor direct from arduino pin you have to use Logic Level mosfet eg. IRFZ44N or use mosfet driver TC4427.
You have to protect transistors by diodes,
swap on schematic drain pin with source pin because now is incorrect.

best regards