Cal

Thanks Sara. I think a cheap 12v to 5v phone charger will work well for me then.
As for the LiPo battery – I will use a small one. Our transmissions are short and the LiPo will be recharged from the lead-acid battery.

I have the V0.5b version of the Mayfly – so I could use the 12v input. But I’m a little worried though that the voltage may…[Read more]

I’m planning to replace some existing datalogging equipment with the Mayfly and keep some of the existing power equipment.

Today I have several stations each with Campbell Scientific dataloggers & sensors, standalone modems, solar panels, lead-acid batteries and charging circuits. The equipment is all 12v based. My desire is to pull out the d…[Read more]

Mdean,

When I went to Carrier Profile 2 (at&t) instead of CP 0, my connect time decreased by about 1 minute. Not a huge improvement. I’m hoping my long connect time is due to poor cell signal or bad configuration – and not a modem problem. I’m going to try to travel to a better area this weekend and see if I get connected faster. I’m also…[Read more]

Brian,

I feel your pain. I tried to get started months ago with logging_to_envirodiy and gave up. I believe the code is at too high a level to understand what is going on, what’s working and what’s not. You really need to get some “bring-up” software in place to be able to write AT commands and see the XBee respond. That’s why I went with the…[Read more]

Sometimes I get the XBee into a mode that won’t respond to AT commands. It has something to do with the sequence of bringing up power to the Mayfly and power to the modem. To get out of this mode, I’d like to try to programmatically “reset” the XBee modem via it’s reset pin #5. In the wiring diagram of the Mayfly, it shows a small circle around…[Read more]

After a sabbatical of several months, I’m now back working on the LTE-M XBee and I HAVE IT WORKING!

For software, I’m using:
– StreamDebugger
– Parts of Diagnostics.ino
– TINY_GSM_MODEM_XBEE
– My own .ino

My hardware is:
– My XBee (Digi XBee3 Cellular Smart Modem XB3-C-A2-UT-001)
– Mayfly 0.5b
– Soldered SJ13
– 3.7v Lipo battery
– USB to Wi…[Read more]

I’ve cut the trace at SJ13 and made the solder bridge to directly connect the LIPO battery to the modem. Now the LTE-M XBee doesn’t reply to anything – I’m sure it’s not powering on. Am I missing some switch or setting? I’m using some version of logging_to_EnviroDIY.ino.

I ordered some parts and I’m back working on this. I have 4 each of Mayfly’s (v0.5b), Hologram SIMs, and XBee3’s (XB3-C-A2-UT-001). I’ve had a little trouble getting the library straight and I intend to learn and install PlatformIO, but for now I’m working on regular Arduino platform. I’m running Sara’s “logging_to_EnviroDIY” … I don’t know if…[Read more]

OK – I’ve cleaned up my library problems as suggested. I’ve paired down the logging_to_EnviroDIY.ino to the bare minimum to check out the modem. I also turned on some debugging and I think I fixed a bug in the code that made it think it was connecting to a WiFi network. I know I got on the cellular network because it showed as active on…[Read more]

I just received the Digi Xbee3 that I ordered a week ago. Now I need a little help with a sketch to get me started. I tried using the code that Beth suggested (Logging_to_EnviroDIY.ino) but never got it to compile. Does anyone have a simple bring-up sketch for this module? You can contact me externally at ckillen@charter.net.

Thanks Beth and Shannon, I’m finally getting a chance to get back to this.

I’m NOT using any sensor with the ADS115 chip so I’ll go back to my 2G setup and comment out those lines of code. I’ll get back to you on my success/failure eventually.

The Digi XBee3™ Cellular Smart Modem, LTE-M seems to be what I want in the long run. I just ordered…[Read more]

Does anyone know when 3G will be available on the Mayfly?

Thanks for your posts Beth and Sara. The more I look into this, the more I believe that Sara is right; I just don’t have 2G service where I live. I found an old Raven 2G modem, plugged it in and it couldn’t connect either. Even knowing that, I tried to run the script that Beth suggested but couldn’t get it to compile:
error: ‘class…[Read more]