Rick Vogel

Yes, this was a custom board I designed for the NWS ASOS program. We are using it for a translator to connect a Vaisala HMP-155E to the ASOS. The original ASOS is RS-232 over fiber and we aren’t able to change the source code any longer. So adding a new sensor required me to make the HMP-155E talk to our system like it was a different sensor.…[Read more]

If you are worried about paying for cellular service you might look into Twilio. They have a SuperSim that we used in our XBee-NB/IOT units that will connect to 4 carriers. It costs $2 month for the card and they only charge you for usage. We were running MQTT w/TLS with small messages for temp every 5 and precip every 15 with other hourly…[Read more]

@neilh20 Yes, the chip supply pretty much put a spike in the Teensy 3.5 for any type of continued development and usage with that chipset. We used the 3.5 because of it’s 5V tolerant I/O. The Teensy 4.1 did not have that so the project stalled for a bit. I believe the folks who have taken that project over are considering moving the XBee to a…[Read more]

Has anyone looked to see if the SDI-12 library could be ported to the new RP2040 chip. Maybe that already works in its existing state, but I haven’t see it mentioned anywhere. This is the new IC that runs the RPi Pico and can be used via the Arduino language.

Can you provide more details especially in reference to your code and how you are connecting to thingspeak?

That is the version of XBee I use as well. They are very short supply. I only have some cause we bought a large supply of them bout a year ago.  The dev board I use with mine to upgrade the cellular firmware and normal XCTU operations is the XBIB-CU-TH. Digi-Key has 200+ of those.

No, the apn would need to be loaded via XCTU or you can place it in the python code before the cellular connection action…

xbee.atcmd(“AN”, “hologram”) —–or whatever your apn is

conn = network.Cellular()

Any arduino code you would like to use. The key is to identify which serial port you have connected to the XBee. For instance if you have it connected to Serial1 then you would want to print out the statements you want sent to Thingspeak like so…

Topic posting to includes multiple fields

Serial1.println(#Pfield1=60&field2=45)

Topic posting to…[Read more]

Try this one:

https://drive.google.com/file/d/1TiLQtE16-ZmfP6aWsBKG9qDgYH7BN1Lv/view?usp=sharing

it seems I have to add your contact email to allow the share. I’ll see if I can post the zip file. It didn’t like the .py files before

I misspoke on the DC/DC supply. It is a Meanwell DDR-15G-5. Pic of the guts on that polycase is attached.

We use a polycase 12x10x6 customized enclosure for under $85 with everything predrilled https://www.polycase.com/yh-121006.

We made a custom din rail bracket to hold the two batteries. 10W panel for solar but charger will accommodate up to 30W

AWS for Xbee

https://www.digi.com/resources/documentation/digidocs/90002219/container/cont_aws.htm

12V to 5V is a DC/DC Din Rail supply P/N: MDR-20-5. The board takes in 5V and and has a 3.3V LDO onboard for those 3.3V parts that pull more than the teensy 3.3V output can provide.

@neilh,

Yes, we have solar to the charger and into (2)12V 9aH batteries (in parallel). The Teensy and Xbee are on a custom motherboard we designed. Has lots of the IO broken out and spots for Adafruit GPS, RTC battery, ESP32 (older requirement) and Wiz850io Ethernet.

See pic attached

See page 16 4.4.8.1

http://www.sdi-12.org/current_specification/SDI-12_version-1_4-Jan-30-2021.pdf

@neilh

Teensy 3.5 topic set up.

@Both

Working on the google drive link for the XBee files if either one of you want them in the future.

Are these Verizon Jetpacks with Wifi or do your modems have a serial connection? We started out with AWS, Verizon Jetpacks w/WiFi and the ESP32. It worked, we just didn’t have an active AWS contract in place so the free trial accounts were running out of room for us. We at that point just set up an internal MQTT Broker so we (National Weather…[Read more]