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ok, so this is something i need for my RV with a 600HP 454. at 17klbs, driving at altitude, i have a lot of things i need to keep track of. mostly AFR, Fuel Flow, CTS, voltage, fans, etc. and seperate the sniper i am collecting radiator, transmission, oil P/T, fuel level, ammeters, in other ways. 2 radiators, 4 transmission heat exchangers, large oil cooler, and heat can still getcha. esp the transmission.
anyway. i have a Sniper, i saw what you did here, and refactored it to include all the messages, enabled wifi and MQTT. its working in the basic form, but i am getting gibberish from the BUS. i havent had time to go parse through all this and see if i have it wrong. but anyhow, i am attaching my code as it exist right now, as it may be very handy, i did a lot of tedious work, i hope this helps someone.
i will update here when i have different results. My Can Bus messages as seen forwarded through MQTT to HomeAssistant. Gibberish. my ammeters as seen on HomeAssistant. HA is handling all the gages, data logging, and other automations used in the RV. updating 10 time per second
Rosebud...I suspect that the sniper does not support the HEFI 3rd Party CAN Communications Protocol, also known as the Racepak protocol. This is usually supported on devices with a second CANBUS.
If you look at posts 60 - 69, they describe the native Holley protocol. Does someone know if the sniper supports the native protocol? If so then change your code to reflect the native protocol pids.
Rosebud...I suspect that the sniper does not support the HEFI 3rd Party CAN Communications Protocol, also known as the Racepak protocol. This is usually supported on devices with a second CANBUS.
If you look at posts 60 - 69, they describe the native Holley protocol. Does someone know if the sniper supports the native protocol? If so then change your code to reflect the native protocol pids.
The Sniper uses the Standard Holley CAN and does not support the 3rd Party CAN, aka Racepack protocol.
it was worth a shot. it only took me about 3 days since you guys did such a good job.
I hope my code proves useful.
the mention of holleys standard protocol, has anyone cracked that can open? I was able to find that my CTS matched the actual if i divided it by 65,535 (16bits). i havent check anything else yet, but i wasnt able to get feedback from a TPS, see anything that looked like revs, etc
kinda a bummer. I REALLY could have used it. that 3" screen is ok. but I'd rather have all my gages on the iPad.
I did find the description of the can protocol on holleys site in the sniper section. I guess I'll double check that. but it sounds like im stuck here.
Rosebud, If all you are looking for is a way to get your gauges on the iPad, then you can buy a USB CANBUS analyzer (Seeedstudio or similar - I use the Seeedstudio Can Analyzer) and download the 'RealDash' application. You have to set up the canbus analyzer to 1000Kbit or 1Mbit and extended frames for RealDash to be able to see the messages from the Holley ECU. I'm using a samsung android tablet in my HMMWV 5.3 LH6 swap with a Terminator X Max.
Rosebud, If all you are looking for is a way to get your gauges on the iPad, then you can buy a USB CANBUS analyzer (Seeedstudio or similar - I use the Seeedstudio Can Analyzer) and download the 'RealDash' application. You have to set up the canbus analyzer to 1000Kbit or 1Mbit and extended frames for RealDash to be able to see the messages from the Holley ECU. I'm using a samsung android tablet in my HMMWV 5.3 LH6 swap with a Terminator X Max.
Cool, i'll check that out. if it is 1000k instead of 500, that would explain the garbage data. i am going building an interface to run I/Os on an esp32-s3.
15 negative inputs (8 16bit 5 12bit)
6 positive inputs (12bit)
1 serial bus
5 unassigned I/Os (12bit in)
8 digital outputs (3.3)
1 I2C buss
1 CAN BUS
1 Addressable RGB pin
1 internal 12V regulated rail for
21 trim pots for adjustable voltage dividers (how you read impedance with an ADC)
i have really bad ADHD, and this tread has sent me down a rabbit hole. that and circuit design and MCU knowledge. this **** is a great practical application of my skills. i have always loved making computers interact with the real world. and this one is crazy!
garsh darnit. i see another improvment i can make. crap, just thought of another one. lol
Cool, i'll check that out. if it is 1000k instead of 500, that would explain the garbage data. i am going building an interface to run I/Os on an esp32-s3.
Esp32 has a native TWAI (CAN) interference. You can use a tja1051 as they support 3v3 io and eliminate the need for a level shifter. I'm using a C6 which has two TWAI interfaces to create a gateway to isolate the sniper.
I'm a bit confused,
If I have a Holley Sniper EFI (Gen 1), is it even possible to connect to it?
If so, can I use the USB cable from the splitter and read data using
Code:
slcand
on Linux?
Or do I need to connect through a CAN bus to USB converter instead?
I am trying to read the data and using QT + C++ to show it as gauges.
I mean it should have, the sensors and the computer communicate somehow
After several failed attempts, I'm not sure what I'm doing wrong.
Is it even possible to decode the CAN bus data from the Holley Sniper EFI (V1)?
I connected it to a CANable Pro v2 and can see raw data, but I haven't been able to decode it like with the Sniper EFI V2.
Does anyone have any insights, or maybe a proof of concept for reading any data?
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a small refactor 
