EnviroDIY | colemanjj | Activity https://www.envirodiy.org/members/colemanjj/activity/ Activity feed for colemanjj. Tue, 05 May 2026 17:41:13 -0400 https://buddypress.org/?v= en-US 30 hourly 2 2c0165b26ab57efb59ec4bf57a4670e8 colemanjj replied to the topic Water Monitoring from a Drone in the forum Infrastructure and Equipment https://www.envirodiy.org/topic/water-monitoring-from-a-drone/#post-13858 Tue, 25 Feb 2020 03:40:51 -0500 Thanks for asking,

After trying several simpler WiFi and cellular boards with only moderate success for about a year, I moved over to the Particle platform.  With generic ESP8266, adafruit feathers and FONO-feathers I found it hard to get things working dependably.  I found cellular communication particularly difficult. I still use some of the o…[Read more]

]]> a75e6878876094e4dd2c16fbb2ebd372 colemanjj started the topic Water Monitoring from a Drone in the forum Infrastructure and Equipment https://www.envirodiy.org/topic/water-monitoring-from-a-drone/ Mon, 24 Feb 2020 04:08:28 -0500 I recently pasted a Particle Electron based water sensor on the back of a drone that enabled the testing of water temperature and Specific Conductance from the air. See: https://github.com/colemanjj/Spudnik-07/blob/Drone/README.md

The drone based sensors are a reduced set of sensors that were implemented for our “Spudnik” unit and described at:…[Read more]

]]> 55df41903556a4bad119feb32ade270a colemanjj replied to the topic Water Monitoring in remote locations with a solar Particle Electron in the forum Environmental Sensors https://www.envirodiy.org/topic/water-monitoring-in-remote-locations-with-a-solar-particle-electron/#post-12701 Fri, 07 Dec 2018 19:17:25 -0500 neilh,
The TDS code currently posted by DFROBOT for the Gravity: Analog TDS Sensor/Meter for Arduino is a total re-write since I downloaded it. The code I downloaded about 6 months ago had an error in it (applied temperature correction to the raw analog voltage) The updated code is much more modular (a bunch of functions) and seems to have the…[Read more]

]]> 8dee330a5ece980865c4333f39b80f71 colemanjj started the topic Water Monitoring in remote locations with a solar Particle Electron in the forum Environmental Sensors https://www.envirodiy.org/topic/water-monitoring-in-remote-locations-with-a-solar-particle-electron/ Tue, 04 Dec 2018 04:19:22 -0500 The Spudnik project is designed to monitor water quality and other environmental parameters in remote locations, report over the cell network and post the monitoring data to Ubidots and the Particle console.

The project is described, hardware identified, and the code posted at:
https://github.com/colemanjj/Spudnik-07

The initial deployment of…[Read more]

]]> 67c517060b2fc271f4f192ea9e0e8b4a colemanjj posted a new activity comment https://www.envirodiy.org/activity/p/3600/#acomment-3609 Tue, 27 Nov 2018 15:58:32 -0500 neilh, Thanks for your thoughts on this.
I’m looking at small rivers and streams. So depth change is generally less than 10 feet, in most cases max change of 1-5 feet. I’d like to get less than 0.1% accuracy and +_ 0.1 inch but I could live with as much as +_ 0.5 inch if I had to.
I’ve been running the BME280 in the mineral oil for about 8 weeks…[Read more]

In reply to - colemanjj posted an update @neilh20, I’m interested in your mention of working on a ” Water Depth probe using gas sensor”. I’ve been testing a water depth probe made with a atmospheric pressure sensor (BME280) in […] ]]> 898bea580455b623b1990248cfde7498 colemanjj posted a new activity comment https://www.envirodiy.org/activity/p/3600/#acomment-3606 Mon, 19 Nov 2018 20:18:34 -0500 I’ve got the calibration OK and I’m using another BME280 for atmospheric compensation. Both BME280s use I2C.
What I’m unsure of is submersing the BME280 in mineral oil. It seems to work but I haven’t heard of anyone putting the BME280 in mineral oil, or any pressure sensor in mineral oil for that matter, to isolate it from the water. Any…[Read more]

In reply to - colemanjj posted an update @neilh20, I’m interested in your mention of working on a ” Water Depth probe using gas sensor”. I’ve been testing a water depth probe made with a atmospheric pressure sensor (BME280) in […] ]]> dd2a77478da95d1cdabb266d4a4ac8ca colemanjj posted an update: @neilh20, I'm interested in your mention of working on a " […] https://www.envirodiy.org/activity/p/3600/ Sun, 18 Nov 2018 03:16:32 -0500 @neilh20,
I’m interested in your mention of working on a ” Water Depth probe using gas sensor”. I’ve been testing a water depth probe made with a atmospheric pressure sensor (BME280) in mineral oil and encapsulated in a section of PVC with a flexible diaphragm at one end. It seems to be working but I need to calibrate etc. I haven’t seen this…[Read more]

]]> 5 167137ec58ccdff89a39a1af2348acc6 colemanjj became a registered member https://www.envirodiy.org/activity/p/3598/ Sun, 18 Nov 2018 03:06:25 -0500 0