wearable posture sensing with bluetooth module
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I had the board manufactured at dirtypcbs.com
All the components were ordered from DigiKey.
I used a toaster/reflow oven to surface mount the components.
I 3d printed a case, I had to divide the case into multiple parts as I have a very small print bed.
I did not break out the ICSP pins to headers/connector on the attached PCB files, this means I had to solder jumper wires directly onto the ATmega32U4 to upload the bootloader.
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h - 3.15 kB - 07/09/2021 at 03:20 |
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ino - 6.13 kB - 07/09/2021 at 03:20 |
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Just wanted to post and mention I am working on another revision of this with a haptic feedback motor which should allow this to be used without bluetooth if necessary/more convenient. When I was testing this I often wanted to have a simpler feedback mechanism.
Quick video showing the process I used to create the posture pack:
I used a teensy 3.2 to flash the bootloader via ICSP. See attached image for connections.
Install pro micro library as described: https://forum.arduino.cc/index.php?topic=363341.0, select teensy port, Change board to ‘pro micro’, Programmer: ‘Arduino as ISP’, now you can flash the bootloader and you can upload a sketch by selecting ‘upload using programmer’.
I'm not a experience tailor so I won't offer detailed instructions for the pocket, however I did use these shirts: https://www.amazon.com/gp/product/B000P50WN0/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
They were long enough for me that I could cut off the bottom 15cm or so and use that to create a pocket as shown in the image.
There are three modes for the sensor,
1) Acceptable posture ( >70 based on my measurements and testing)
2) Below threshold, user receives 'You're Hunching!' notification followed by measured posture
3) Sensor is placed on flat surface, outputs current posture, average angle, number of samples and firmware version (sample output below shows current angle -12, average: 75, samples 1662 and version 7.
ImageryEel
benjaminaigner
Nikola Secerovski
georg ottinger
WΛLLTΞCH