PepitoGrillo7182 Posted July 3, 2023 Report Share Posted July 3, 2023 I have an accelerometer that sends its data via CAN-bus. I want the ECU to read it. The first way to do so is to configure the ECU in the following way: But as far as I could guess, this variables are only for transmitting. If I try to store this configuration, the following error appears: How can I configure the ECU so the data it recieves is stored inside these variables? Thank you so much! Quote Link to comment Share on other sites More sharing options...
Vaughan Posted July 3, 2023 Report Share Posted July 3, 2023 The built in Accelerometer runtimes can only be written to by the ECU not over CAN. Use CAN Analogs to receive your accelerometer data Quote Link to comment Share on other sites More sharing options...
PepitoGrillo7182 Posted July 4, 2023 Author Report Share Posted July 4, 2023 Does this mean I only have 16 variables to store analogic data recieved by CAN? For example, if I have a self-made CAN-BUS gateway that picks the data from all the gauges and sends it to the ECU, I need to store them in CAN analogs? Thanks! Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 4, 2023 Report Share Posted July 4, 2023 Yes, 16 CAN analogs, 16 CAN digitals, 8 CAN frequencies, 8 CAN Thermocouples. Quote Link to comment Share on other sites More sharing options...
PepitoGrillo7182 Posted September 8, 2023 Author Report Share Posted September 8, 2023 Isn't there any way to increase this number? Because with this I understand the maximum amount of sensors I can place in my car is 31 (11 general-use analog inputs, 4 temperature analog inputs and 16 CAN analog inputs). Seemps pretty low Quote Link to comment Share on other sites More sharing options...
dx4picco Posted September 8, 2023 Report Share Posted September 8, 2023 CAN TC and CAN Freq could easily be used aswell. But heck, what would be the 31 analog sensors you would use to need all of that? ! Quote Link to comment Share on other sites More sharing options...
PepitoGrillo7182 Posted September 16, 2023 Author Report Share Posted September 16, 2023 It ain't that much. The idea is not to have an external datalogger: 4x wheel velocity 4x suspension gauges 4x tyre temperature 6x acceleration in all axes (both front & rear) 3x GPS velocity in all axes 2x break pressure (front & rear) IAT, TPS, Lambda... more common sensors To analyze data, 31 variables ain't that much. Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 16, 2023 Report Share Posted September 16, 2023 Wheel speeds are CAN frequencies, you have 16 of those available. You would likely have enough CAN inputs to log all those as raw inputs, assuming they are all <16bit, but unlikely enough GP Inputs to convert all those inputs into calibrated/labelled channels in real-world units. In terms of GP analog inputs that are needed for the less common input types, there are only 4 x analog, 4 x temp and 4 x pressure so you will have to pick which of those are important to you. As Vaughan mentioned there is already a 3 axis accelerometer onboard, I have never seen anyone use 2 accelerometers. Im not sure what you mean by 3 x GPS velocity, I haven't seen a CAN GPS device that outputs velocity of each axis separately. But if it really does then these would also be CAN Frequency inputs like the wheel speeds. Quote Link to comment Share on other sites More sharing options...
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