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About eriks4

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  • Birthday 28/10/1967

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    Lotus Esprit S4

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  1. Hi Robin, I can upload some files that I recorded with my S4. Just send me a PM with an email address and I will upload them using wetransfer. Kind regards, Erik
  2. RLTC = Rich Lean Transition Counter The numeric value at the top of the RPM plot indicator is the (computed) ratio of RPM/speed with speed in km/h. This ratio is used to estimate the gear. Enjoy, Erik
  3. Paul, A 1228708 was used for many different cars. Are you certain you got one with an Esprit EPROM and MEMCAL? If so, are you running the same version of the software as in your other ECU or a different one? Erik
  4. Vince, I hope with the info about the timing you get your software to work. Please not that the Arduino Due I used does not use any of the standard AVR processors but an ARM processor. I think that if I would write the software directly in AVR assembly language it would run fast enough. However, I wrote it in the Arduino environment and when running it on an Arduino with an AVR processor (the Arduino Mega) I was loosing data. The Due is faster and works ok. So the binary is only for the Arduino Due, it will not run on other Arduinos. You mention that you made an ECU simulator. For the testing of new versions of Espritmon, but also for the datarecorder, I use a spare ECU. I bought one in the US that is the same type used in the Esprit and replaced the Eprom with an Esprit version. Next I built a small circuit that simulates most of the loads/inputs on the ECU terminals and a block-wave (frequency controllable) to simulate that the engine is running. As a result the ECU thinks it is in a real Esprit and the data output on the ALDL is the real thing - i.e.not simulated. I really recommend such a setup as it prevents the issue you describe - having something working on your desk with the simulator but not when connected to a real Esprit. Here are two older pictures of my setup: The module on top of the ECU generates the inputs, the white box in the second picture is the ALDL to serial box, connected to the laptop running a version of Espritmon. Enjoy, Erik
  5. This is an overview of the components needed to build the logger. In my Esprit I have a D15 female to ALDL connector, hence the 15 pin male in the proto. The green LED blinks each time mode1 data is transferred, the green one for any ALDL data. This helps to verify whether communication is ok and whether actual mode1 data is received. The RTC module is used to obtain time and date (for the logfile name). The software for the Arduino DUE is in the logger.bin file. For the DIY people, this is all you need to build one yourself. Enjoy! logger.bin
  6. Just for fun I recently used an Arduino Due to create a solid state mode 1 ALDL recorder. It interogates the ECM like Espritmon, Freescan and the Tech 1 tool do and it stores the data as a .CSV file on an SD card. The data can be read and plotted using Espritmon. Building the recorder yourself is not very difficult and in fact easier than an ALDL-serial interface since the Arduino already has TTL level instead of the +-12V. Hardware comprises Arduino DUE, real-time clock module, SD card shield, one resistor and 1 diode. Will post more info soon.
  7. Espritmon works on Windows 7 and 8. I haven't tested it on Windows 10 yet, but there is no reason why it would not work. The only potential issue is that most computers no longer have a real RS232 port (which you typically use to connect a serial to ALDL interface). Many of the available USB to serial interfaces only support the standard baud rates, i.e. 2400, 4800, 9600, 19k2 etc. and not the 8192 bits/sec needed by the Esprit ALDL. So if you have a DIY RS232 to ALDL you may run into an issue with a USB to RS232 cable. For Windows 7 there is a registry hack for a particular chipset used in many USB to serial converters (described in the Espritmon manual). Some other chipsets (RTDI) do support non standard baud rates. So, it comes down to what converter cable you buy. Clearly the folks selling USB converter cables to connect to the ALDL (USB to ALDL, typically with RS232 in between) have solved this issue for their cable. In that case Espritmon will run on Windows 10 if the cable supports it. Hope this helps, Erik
  8. you can use Espritmon to save the contents of the PROM to file and do a comparison.
  9. Hoi Freek,

    Hoop dat het goed met je gaat, en met de Esprit. Had weer eens wat tijd om te knutselen en heb een ander soort ALDL interface gebouwd. Een Arduino die met een comport (die al TTL is) met de ALDL praat en lokaal de hele tijd mode 1 requests stuurt. Het resultaat (de 68 mode1 bytes) stuurt de Arduino vervolgens via bluetooth naar een virtuele comport (nu op 38400 baud). Espritmon hoefde ik verder niet aan te passen, gewoon de bluetooth comport als input zetten en de binnenkomende data wordt geparsed. Als ik wat meer tijd heb ga ik het Arduino deel uitbreiden dat ie ook requests van de PC kant voor mode 2 en 4 etc. accepteert. 



    1. fjmuurling


      Hoi Erik,

      Met mij gaat alles goed maar erg druk, hopelijk gaat het met jou ook goed.

      Het is alweer een tijdje geleden dat we elkaar gesproken hebben. Mijn Lotus staat nog steeds op blokken door allerlei oorzaken maar ik heb de draad weer opgepakt en er zit weer progressie in.

      Ik ben eindelijk ook weer eens bezig met de ECU en wel om een er een schema van te maken.

      Je arduino project klinkt zeer interessant, ik wil er graag meer over horen als dat kan.

      Tot spoedig horens,





  10. and updated the espritmon archive on the website to include the DEU.cfg file
  11. and this is the equation used in Espritmon (with n the 8 bit value from the mode 1 stream) com_map=n*2.0/255.0+0.08;
  12. In the zip archive a file is missing. Didn't notice it before. It is easy to fix. Go to the Espritmon CFG directory, Create a file with the name DEU.CFG Put the following contents in this file: DEU=256 USE_NET=0 USE_DINPUT=1 MOUSE_ACTIVE=1 MOUSE_TIMER=2000 DUALMODE=0 Save the file and rerun Espritmon. Erik
  13. Ah, it is an integration of the fuel that is provided to the engine during each injection phase. I use the duty cycle of the injectors (injector pulse width window) and the capacity of the injector to estimate the amount of fuel injected each time. This is integrated over time. It is an approximation of the actual fuel that has been used. I typically find it a bit of an over-estimation, but not by much. Hope this answers your question, Erik
  14. I'm sorry but I do not understand the question, what is it you wanted to know about the fuel data in Espritmon? Erik
  15. Espritmon opens three log files to store data, one for the ECU, one for the ABS and one for the SIR. If you do not use the ABS or SIR modes, these files will have 0 length. The file with the ECU data starts with Esprit, followed by a set of numbers divided by underscores. The numbers are actually month, day,hour,minutes,seconds of the time the file was opened for writing (e.g. esprit_10_15_19_00_00.log would be a file opened for writing today at 7 PM. Erik
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