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alek-91 Added a reply to DIY mtb telemetry system
11/13/2024 7:46am On GitHub you can find a library to convert any data (even excel ) to Motec, as well as back in the thread I put my code to convert to i2m data format. Nothing crazy is just ordering different the data. Nice to see many projects starts after my initial kick
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alek-91 Added a reply to DIY mtb telemetry system
2/12/2024 8:25am Ducati is testing with (I Think) homemade magnetic potentiometer... This Is also my idea for bicycle. It is quite reliable
alek-91 Added a reply to DIY mtb telemetry system
1/29/2024 1:49am Cool, this would have been the natural step for my project as well. Unfortunately I face against similar problem with BLE transmission and smartphone logging. I actually also realize that laser sensing is quite nice in terms of weight and easiness to work with, but not really usable in real mtb/motorcycle application due to the dirt that is accumulating on...
happymeal Liked a reply to forum topic DIY mtb telemetry system
1/29/2024 1:44am
Hi All! For the past year or so, i have also been working on my own MTB telemetry system, very similar to alek-91's idea. I had incorporated the VL53L4CD sensor onto a PCB, which also contains a BLE module and PIC to act as the "master" microcontroller. The PCB design was pretty interesting, trying to fit as much (and minimal) components as possible onto the board. I've currently had some assistance with developing a mobile application to view, download and analyse the data, so feel i'm not quite there in terms of analysing the results, but its been interesting so...
This forum topic has 133 replies.
dolface Liked a reply to forum topic DIY mtb telemetry system
5/24/2023 5:20am
This guy has a working system, posting here for wider exposure: https://www.mtbr.com/threads/sufni-suspensiont-telemetry-an-open-source…
This forum topic has 133 replies.
alek-91 Added a reply to DIY mtb telemetry system
3/7/2023 4:58am https://wiki.aalto.fi/display/MEX/DIY+suspension+wizard+-+mountain+bike… I found out also this project on the web .
alek-91 Added a reply to DIY mtb telemetry system
3/3/2023 8:21am Nice to see someone that is working on the same stuff... Sharing information is always useful. If you arrange how to download data via Wifi it will eb awesome cause than you can customize a proper app on the phone.
alek-91 Added a reply to DIY mtb telemetry system
3/3/2023 8:20am Hey Devin, in the post where there is the amtlab script you basically have all the info to convert to final file. You just need to save everyting in .dat file. If you want to have an example file you can download form i2m website. I need to say that now there are a lot of user friendly webapp or...
alek-91 Added a reply to DIY mtb telemetry system
12/1/2022 6:10am Sorry to not answer for very long time, but i was not hecking this post anymore. I am using the device time to time with the bicycle and also with the motorbike, but unfortunately with the second one is much less reliable due to vibration problems. I am very interested in you logging with the phone, in particular how you...
alek-91 Started a new thread DIY mtb telemetry system
8/5/2022 3:42am Hi guys, Covid lockdown period in Europe was tough so I started my own project for a supension diy data logger, and after some fails i got an acceptable result
I am using micro LiDar sensor for both front and rear suspension. Front sensor is integrated into the stem 
and it weigth much less than a proper potentiometer...
and it weigth much less than a proper potentiometer...
This forum thread has 133 replies.
alek-91 Added a reply to DIY mtb telemetry system
1/12/2022 2:11am This is the matlab code that i use to convert data to the software format. [i]% INSERT CHANNELS PARAMETERS simfile = 'data_20210712_16_30_47.dat'; an1_min = 0; an1_max = 1023; an2_min = 0; an2_max = 1023; an3_min = 0; an3_max = 1023; an4_min = 0; an4_max = 1023; an5_min = 0; an5_max = 1023; an6_min = 0; an6_max = 1023; an7_min =...
alek-91 Added a reply to DIY mtb telemetry system
12/20/2021 7:40am obviously you need to format your file in a way is readable for the software. In the case of Danas you need to specify some "encoding" at the beginning, suche as name of the channel, position , gain and offset, but if you open the dat file given as example you can get out from there. For others softwares this...
alek-91 Added a reply to DIY mtb telemetry system
12/9/2021 8:01am I did not managed completely by hardware cause the ST sensor has some limitation due to the timing of ranging. In short mode measurement you can reach max 66 Hz frequency by hardware. Then by software i used linear interpolation to reach 100 Hz frequency, instead to use directly a 100Hz and have repeated values. I run a comparative with...
alek-91 Added a reply to DIY mtb telemetry system
11/10/2021 3:15am
alek-91 Added a reply to DIY mtb telemetry system
11/4/2021 2:38am i bought these from china. Quite cheap and they works quite good. http://www.htc-sensor.com/products/212.html cost around 60-80 € depends on the stroke length.
alek-91 Added a reply to DIY mtb telemetry system
11/3/2021 6:28am Yes potentiometer are calibrated in distance bur they have a lot of wires and not always i want to optimize damping, in the end once you run in similar condition with similar air spring rate you will not change so much the damping but you still want the telemetry. I want to keep the setup as it is now and...
nollak Liked a reply to forum topic DIY mtb telemetry system
11/3/2021 6:25am
Ah ok, I thought you were doing the damping optimazation with the sensor. But shouldn't the analog potentiometers be enough as one source of information? Or are they not calibrated for travel?
This forum topic has 133 replies.
alek-91 Added a reply to DIY mtb telemetry system
11/2/2021 8:55am Hi Nollak, Frequency limit is quite low, it's true but i can anyway run with potentiometer at 200 hz as it is now. I would like anyway to have position record (not for damping tuning) but more for kinematics and sag analysis of the bike during the run. I am building a kinematic program that will compute bicycle position and...
alek-91 Added a reply to DIY mtb telemetry system
10/29/2021 3:37am It will depend on the buffer size of sensor bluetooth, this is one information still missing from the manufacturer. If it can handle a circular buffer at 60 Hz that make synchro with the 10 hz GPS probably the delay is not critical. I'll keep you updated on this.
alek-91 Added a reply to DIY mtb telemetry system
10/28/2021 11:39pm Since the winter is starting again i wanted to make another step on this project. Right now I can run both analog signals (linear potentiometers front and rear) and laser sensors, but now i would like to go wireless with the laser sensor I found out this board https://www.gilisymo.com/sensors/22-ls53l1bt.html that has the same sensor i used but also accelerometers and...
