Edge Collective
Off-grid GPS
Off-grid gps navigation2021-10-05 12:29:14
https://www.sparkfun.com/products/15210
schematic for sparkfun project https://cdn.sparkfun.com/assets/3/c/2/2/e/SparkFun_Ublox_SAM-M8Q.pdf
EC project stub: https://github.com/edgecollective/gps
2032 batt holder https://www.digikey.com/en/products/detail/keystone-electronics/3034/4499289
keystone 1060 batt holder for 2032 https://www.digikey.com/en/products/detail/keystone-electronics/1060/303556
keystone 1058 batt holder https://www.digikey.com/en/products/detail/keystone-electronics/1058/5255484
compass https://learn.adafruit.com/lsm303-accelerometer-slash-compass-breakout/downloads
2021-10-13 14:15:47
Neo-6M module https://create.arduino.cc/projecthub/ruchir1674/how-to-interface-gps-module-neo-6m-with-arduino-8f90ad
2021-10-13 15:22:33
neo-6m black pinout 
2021-10-29 15:49:19
beitan gps + compass widget https://www.amazon.com/dp/B078Y6323W
pinout:
repo with previous 'compass experiments' -- https://github.com/edgecollective/compass-experiments
2021-11-18 13:01:19
Going to keep going by working on dc4 https://github.com/edgecollective/dog-compass
Switching over to the feather sense -- has on-board compass + accel -- https://learn.adafruit.com/adafruit-feather-sense
DC4 uses 10DOF breakout, gets compass and gps readings ...
basing DC5 off of 10DOF, and this code: https://github.com/edgecollective/compass-experiments/blob/main/ver_0.4-alpha/base_featherm0_i2c_compass_oled_lora/base_featherm0_i2c_compass_oled_lora.ino
DC5 can now do the compass thing. https://github.com/edgecollective/dog-compass/tree/c405d9c2479334dbd5f5723fbf30fd0d8ae008ed/dc5
remote (r1) is based directly off this code: https://github.com/edgecollective/compass-experiments/blob/main/ver_0.4-alpha/remote_featherm0/remote_featherm0.ino
2021-11-19 08:08:38
How to calibrate the 10DOF / 9DOF sensor ...
2021-11-19 11:51:13
MIT App inventor
http://iot.appinventor.mit.edu/assets/tutorials/MIT_App_Inventor_Basic_Connection.pdf
Example codes for receiving text https://community.appinventor.mit.edu/t/ble-esp32-bluetooth-send-receive-arduino-ide-multitouch/1980/7
2021-11-19 12:30:48
https://www.reddit.com/r/esp32/comments/q3jm20/advice_on_pushing_gps_positions_from_esp32_to/
https://github.com/Buffalchill/ESP32-BLE-Appinventor2
https://github.com/RuiSantosdotme/ESP32-Course/tree/master/code
2021-11-19 13:19:29
Below example apk worked:
https://github.com/dwblair/ESP32-Course
Associated post to extend to two values, here: https://rntlab.com/question/esp32-ble-to-mit-app/
2021-12-02 12:44:58
This device now in stock:
https://www.adafruit.com/product/4413
Great post on magnetic sensor calibration: https://learn.adafruit.com/adafruit-sensorlab-magnetometer-calibration
2021-12-02 13:15:00
Okay, looks like this is the GPS module to work with for now:
The LSM303 module via amazon: https://www.amazon.com/HiLetgo-LSM303DLHC-Compass-Accelerometer-Magnetometer/dp/B07X3GFKYD/ref=sr_1_5?keywords=magnetometer+accelerometer&qid=1638469212&sr=8-5
LSM303 flora: https://www.amazon.com/Adafruit-Flora-Accelerometer-Compass-Sensor/dp/B00OKJFELC
LSM303 via adafruit STEMMA: https://www.adafruit.com/product/4413
LSM303 in some random Amazon package: https://www.amazon.com/HiLetgo-LSM303DLHC-Compass-Accelerometer-Magnetometer/dp/B07X3GFKYD/ref=sr_1_1?keywords=LSM303&qid=1638470322&sr=8-1
2021-12-06 15:18:49
M0 wake from interrupt code example: https://github.com/ProjectsByJRP/M0_Sleep_External_Int
Also: the RTCZero library is available
This seems to be the edge-mount SMA part: https://www.digikey.com/en/products/detail/samtec-inc/SMA-J-P-H-ST-EM1/2602450
QT to male header cable on adafruit: https://www.adafruit.com/product/4209
horiztonal JST 4 pin connector / stemma https://www.adafruit.com/product/4392 -- hor
vertical (through-hole) JST 4 pin connector: https://www.adafruit.com/product/4390 -- even nicer! use this on CO2!
adafruit monochrome OLED 128x64 that works with stemma -- nice find! https://www.adafruit.com/product/326
image transfer, bluetooth BLE https://learn.adafruit.com/bluefruit-le-connect/image-transfer
tile downloader via OSM: https://wiki.openstreetmap.org/wiki/OpenLayers_Local_Tiles_Example
downloading tiles https://help.openstreetmap.org/questions/43792/can-i-download-osm-tiles-for-offline-use
openmaptiles https://openmaptiles.org/
create vector tiles from openstreetmap https://openmaptiles.org/docs/generate/generate-openmaptiles/
openlayers with tile coords for debugging https://openlayers.org/en/latest/examples/canvas-tiles.html
2021-12-07 10:51:27
Adafruit TFT display I have for testing: https://www.adafruit.com/product/358
Associated product tutorial: https://learn.adafruit.com/1-8-tft-display/downloads
imagemagick create 24 bit bitmap:
convert 2color.bmp -type truecolor 24bit.bmp
resize:
convert dragon_sm.gif -resize 64x64
If use '^', it will fill the image based on smallest dimension:
convert dragon_sm.gif -resize 64x64^
Simple plotting code using Adafruit graphics library:
https://forum.arduino.cc/t/another-free-graph-function-for-plotting-in-cartesian-space/354751
Waveshare display https://www.amazon.com/gp/product/B0728BJTZC/ref=sw_img_1?smid=&psc=1
2021-12-24 12:25:22
gps module pinout
working version as of today:
https://github.com/edgecollective/dog-compass/tree/9dd1343122612f8e2b601ca395b1c6348577246c/v3
2021-12-29 14:48:24
Kicad layout ver4 / 'base_a' https://github.com/edgecollective/dog-compass/tree/3671ac027cc06751b30f98f3e344d27f657715df/v4/hardware/base_a/kicad
2021-12-29 21:13:27
Basic layout with sharp screen placement and gps 'stalk':
https://github.com/edgecollective/dog-compass/tree/5e5f83493c11156845356251b360087a64f98a79/v4
To do:
- check mosfet footprint
- add QWIIC connector
- add 'divot' for JST cable
- add anchor 'holes'
- check size of gps antenna and make 'stalk' appropriately
2021-12-30 12:38:49
For now, going to go with this version of the GPS module:
https://www.amazon.com/dp/B01D1D0F5M
Cheap, large antenna, and flat back for taping
2022-01-03 16:31:03
Note: the BNO005 IMU has 'suspend' capability in adafruit arduino library --
https://github.com/adafruit/Adafruit_BNO055/blob/master/Adafruit_BNO055.cpp#L791
-- so let's just connect it to 3V & GND, don't put it on mosfet as yet
apparently suspend should use 0.04 mA (40 uA?), cf https://cdn-shop.adafruit.com/datasheets/BST_BNO055_DS000_12.pdf
2022-01-04 12:09:11
Adafruit edge-launch connector: https://www.adafruit.com/product/1864
Note: requires a .8mm thickness board. Should we go with through-hole instead?
Maybe no: for simpler antennas, better to have ability to just go 'straight out' ... (although could have right-angle through-hole ...)
Through-hole might be safer for now -- amphenol part that seems to work: https://www.digikey.com/en/products/detail/amphenol-rf/132136RP/1011910?s=N4IgjCBcoLQBxVAYygMwIYBsDOBTANCAPZQDa4YArCALoC%2BdhATGeAMxNhsBsASgAq06QA
eep! $11 on digikey!
okay, more specs:
- looks like lora comes in SMA and RP-SMA
- looks like we want 50 Ohm impedance
Maybe edge-mount is better in terms of price ...
Okay Amphenol 132134 -- vertical, through-hole, SMA is $5 on digikey: https://www.digikey.com/en/products/detail/amphenol-rf/132134/1011907?utm_adgroup=Connectors%20and%20Interconnects&utm_source=google&utm_medium=cpc&utm_campaign=Shopping_Supplier_Amphenol%20RF_0115_Co-op&utm_term=&utm_content=Connectors%20and%20Interconnects&gclid=Cj0KCQiA_c-OBhDFARIsAIFg3exWn5x0L7IgpDIH9tc9GQhpB8LEb58bqIZu1k5v-SAiMrYhqyfy_aIaAu0iEALw_wcB
$5 Molex edge-launch 0732511150 SMA: https://www.digikey.com/en/products/detail/molex/0732511150/1465156; datasheet: https://www.molex.com/pdm_docs/sd/732511150_sd.pdf
looks like it would accommodate 1.6 mm thickness board ...
Molex 0733910083 SMA-RA right-angle through-holde, cheap -- $4 -- https://www.digikey.com/en/products/detail/molex/0733910083/9740783
check footprint: same as prior -- seems standard through-hole footprint --
Verdict: let's do through-hole for now to eliminate variable of board thickness
2022-01-05 13:44:48
Pinout assignments
A0 Free / optional lorawan A1 Speaker A2 Button A A3 Button B A4 Button C A5 Write Permit
D0 RX D1 TX D5 Sharp Display D6 LoRa RST D9 GPS Power Switch D10 free (so that we can use microsd breakout) D11 LoRa CS D12 LoRa IRQ D13 free
Submitted to JLCPCB 5-JAN-2021: version 4 of 'tracker' v 0.1
scavenger hunt
2022-01-07 13:17:37
CUI SMT buzzer options:
https://www.digikey.com/en/products/detail/cui-devices/CSS-0575A-SMT-TR/2364642
Nice article on buzzers https://www.cuidevices.com/blog/buzzer-basics-technologies-tones-and-driving-circuits
good guide to rp-sma vs sma https://www.spo-comm.de/en/blog/know-how/what-is-the-difference-between-sma-and-rp-sma
adafruit uses rp-sma antennae, so that's what we'll go with
2022-01-08 13:26:21
3 7/8 " by 1 1/8 "
5 pack clear cosmetics bag https://www.amazon.com/Cosmetics-Wobe-Organizing-Waterproof-Organizer/dp/B07C1P1LMN/ref=sr_1_24?crid=2YLXIOJKUXZ0Z&keywords=waterproof+camping+pouch+plastic&qid=1641670849&sprefix=waterproof+camping+pouch+plastic%2Caps%2C53&sr=8-24
small plastic zip document bag w/ string https://www.amazon.com/dp/B07BRYMSM6/ref=sspa_dk_detail_7?psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFVME4wOUlBRlJYUDImZW5jcnlwdGVkSWQ9QTEwMzg1MzExME02VDBKSFBBMTNOJmVuY3J5cHRlZEFkSWQ9QTAxODE3NzEzT1FWSFNaOTlNMTJMJndpZGdldE5hbWU9c3BfZGV0YWlsMiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=
plastic pouch with holes
2022-01-08 21:34:19
Boards ordered for remote node
2022-01-11 09:28:54
Adding a clicky marker to Leaflet https://gis.stackexchange.com/questions/172508/add-an-event-listener-on-a-marker-in-leaflet/172586
2022-01-12 14:26:09
Revised header for sharp display -- sent in tracker ver 0.2:
JLCPCB Order #: Y47-2489114A 2022-01-13 (china time)
"the other rule of thumb for 3D printed cases with heat-set inserts for your PCB mounting holes--I want ideally a 8mm circle with no components on either side, centered on each mtg hole."
2022-01-13 12:06:20
Through hole slide switch right angle: https://www.digikey.com/en/products/detail/c-k/OS103011MA7QP1/1981432
ideal -- through hole slide switch right angle (out of stock): https://www.digikey.com/en/products/detail/e-switch/EG1270/6076
good one to go with:
EG_1213
https://www.digikey.com/en/products/detail/e-switch/EG1213/101735
similar alternative:
C&K OS102011MA1QN1
https://www.digikey.com/en/products/detail/c-k/OS102011MA1QN1/1981430
https://www.digikey.com/en/products/detail/apem-inc/MHSS1105/1949465
2022-01-13 12:51:15
Nice reference for sharp display: https://learn.adafruit.com/circuitpython-display-support-using-displayio/ui-quickstart
gps -- make piezo a through-hole buzzer -- use right angle switch -- all ports on one side ...
would be nice to have a buzzer on the remote node, just to have a 'buzzer badge'
update: test piezo when it arrives, for loudness ... then add / or not
2022-01-18 17:10:31
Button pressing in circuitpython https://learn.adafruit.com/multi-tasking-with-circuitpython/buttons
Circuitpython debouncer library: https://learn.adafruit.com/debouncer-library-python-circuitpython-buttons-sensors/
library repository: https://github.com/adafruit/Adafruit_CircuitPython_Debouncer
2022-01-21 22:23:15
latest 'trace.py' code will show latest 100 datapoints https://github.com/edgecollective/dog-compass/blob/28695531aa75c3c57e9ae1f70cf4403398ea132d/tracker_v_0.2/firmware/CPY/v5/trace.py
note: the labels on the switches need to be updated, they're covered currently ...
2022-01-22 20:56:09
Testing IMU on tracker 0.2 ...
@property
def calibration_status(self):
"""Tuple containing sys, gyro, accel, and mag calibration data."""
calibration_data = self._read_register(_CALIBRATION_REGISTER)
sys = (calibration_data >> 6) & 0x03
gyro = (calibration_data >> 4) & 0x03
accel = (calibration_data >> 2) & 0x03
mag = calibration_data & 0x03
return sys, gyro, accel, mag
2022-01-24 12:20:44
Magnetic declination at 10 Conant Rd, Lincoln, MA
via: https://www.ngdc.noaa.gov/geomag/calculators/magcalc.shtml
Datasheet for bno-005 bosch absolute sensor https://cdn-shop.adafruit.com/datasheets/BST_BNO055_DS000_12.pdf
2022-01-27 16:29:5
Latest circuitpython setup:
dog-compass/tracker_v_0.2/firmware/CPY/v5/base_gps_radio.py on the base,
and
dog-compass/node_v_0.1/firmware/CPY/v5/gps_radio.py on the remote
unfortunately, can't do sufficient math in circuitpython, because don't have the floating point precision
switching to arduino!
2022-01-27 21:37:06
have radio, gps, and imu ... and comm from remote node ... up and running!
need to test angle, and add graphics, next ...
2022-01-29 21:39:40
Working pair of remote node and tracker:
Remote node (v_0.1): https://github.com/edgecollective/dog-compass/tree/c831426e3f56c6998b5059f3d2dd5fc5f9f557b8/node/node_v_0.1/firmware/arduino/v1/remote
Base / Tracker node (v_0.2): https://github.com/edgecollective/dog-compass/tree/c831426e3f56c6998b5059f3d2dd5fc5f9f557b8/tracker/tracker_v_0.2/firmware/arduino/v1/base
2022-02-02 14:26:42
Issue with floating point precision in python perhaps resolved with Decimal class ...
Adafruit GPS library for Circuitpython https://github.com/adafruit/Adafruit_CircuitPython_GPS
started gps experiment at 1500 on FEB 2
from dual_gps.txt ...
note that the green line -- which is running circuitpython -- seems relatively discretized ...
2022-02-03 13:05:18
42.41222395647637, -71.29805764333454
converting incoming nema to degrees:
https://forums.raspberrypi.com/viewtopic.php?t=175163
Lat : 3137.36664 becomes 31 degrees and 37.26664 seconds = 31 + 37.36664/60 = 31.6227773 Lon : 00212.21149 becomes 2 degrees and 12.21149 seconds = 2 + 12.21149/60 = 2.20352483
Note: in below figure, the 'base' node has the smaller gps antenna ..
2022-02-03 19:58:37
Signal strength vs distance
Plotting code used: https://github.com/edgecollective/dog-compass/blob/1aa356f5e9fd41f634622cdf9d10ee23f7e90a0a/tracker/tracker_v_0.2/firmware/arduino/analysis/pydist.py
Using this code on the 'base' node, which outputs the proper strings https://github.com/edgecollective/dog-compass/tree/1aa356f5e9fd41f634622cdf9d10ee23f7e90a0a/tracker/tracker_v_0.2/firmware/arduino/v1/base
And is read in by this code: https://github.com/edgecollective/dog-compass/blob/1aa356f5e9fd41f634622cdf9d10ee23f7e90a0a/tracker/tracker_v_0.2/firmware/arduino/analysis/readline.py
3d plot:
Generated using this code: https://github.com/edgecollective/dog-compass/blob/1aa356f5e9fd41f634622cdf9d10ee23f7e90a0a/tracker/tracker_v_0.2/firmware/arduino/analysis/3dplot.py
2022-02-05 18:19:10
Enclosure design
https://hackaday.com/2017/05/24/practical-enclosure-design-optimized-for-3d-printing/
https://hackaday.com/2020/11/16/simple-tips-for-better-3d-printed-enclosures/
https://hackaday.com/2021/12/12/customize-these-3d-printed-cases/
https://willem.aandewiel.nl/index.php/2022/01/02/yet-another-parametric-projectbox-generator/
https://hackaday.com/2022/01/31/this-parametric-project-box-generator-is-super-easy/
Prusa 3D Printer https://www.prusa3d.com/category/original-prusa-mini/
2022-02-05 20:42:43
Folium docs https://python-visualization.github.io/folium/quickstart.html#Getting-Started
Online jupyter notebook: https://jupyterlite.readthedocs.io/
2022-02-11 22:44:28
color-coded by distance:
2022-02-19 08:40:02
High-accuracy GPS from Sparkfun: https://learn.sparkfun.com/tutorials/gps-rtk2-hookup-guide?_ga=2.9331189.1546501649.1645193699-1617606000.1645193699
Connecting to a correlation source https://learn.sparkfun.com/tutorials/gps-rtk-hookup-guide/all#connecting-the-gps-rtk-to-a-correction-source
2022-02-20 14:02:47
Memory management tips in circuipython:
https://learn.adafruit.com/Memory-saving-tips-for-CircuitPython?view=all
14K log file for gps data had 523 lines ... that's about 26 bytes per line ...
looks like we have about 100K free now ... so that's about 3800 lines we could save .. at 10 second measurement intervals, that's 60 hours of measurements
2022-02-20 18:33:06
https://learn.adafruit.com/adafruit-9-dof-orientation-imu-fusion-breakout-bno085/overview
using lora w sd card -- looks like we can basically just use the CS pin to deselect radio before using SD card
https://forums.adafruit.com/viewtopic.php?f=24&p=860057
2022-02-21 18:43:18
https://github.com/helscream/HMC5883L_Header_Arduino_Auto_calibration
http://arduino-er.blogspot.com/2015/04/hmc5883l-library-with-calibration-for.html
2022-02-22 19:59:47
Sparkfun tutorial on compass calibration https://www.youtube.com/watch?v=k6ccH8QYGK8
2022-02-24 12:08:25
LSM303DLHC
https://www.amazon.com/gp/product/B07X3GFKYD/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
https://learn.adafruit.com/lsm303-accelerometer-slash-compass-breakout/which-lsm303-do-i-have
Calibration code: https://learn.adafruit.com/lsm303-accelerometer-slash-compass-breakout/calibration
Mag Minimums: -75.91 -90.00 -26.12 Mag Maximums: 68.45 46.55 130.82
2022-02-24 12:54:33
This library works with the above lsm303 module:
https://github.com/pololu/lsm303-arduino
min: { -668, -761, -23} max: { +586, +422, +1034}
2022-03-16 17:30:56
2xAA batt holder w/ pins
https://www.keyelco.com/userAssets/file/M65p28.pdf
