Metro M4 Airlift issues with Weather Shield

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Infinite
 
Posts: 4
Joined: Sun May 17, 2015 9:22 am

Metro M4 Airlift issues with Weather Shield

Post by Infinite »

Hi all,

I’m trying to measure rainfall remotely using a Weather Shield + Rain bucket and Adafruit M4 Airlift + 4G.

Everything else we send through the Airlift + IO works like a dream, but we can’t seem to get this one part to click.

When the shield is mounted to a standard Uno R3 the data reads:

Code: Select all

$,winddir=-1,windspeedmph=0.0,windgustmph=0.0,windgustdir=0,windspdmph_avg2m=0.0,winddir_avg2m=359,windgustmph_10m=0.0,windgustdir_10m=0,humidity=47.1,tempf=-1766.2,[b]rainin=0.22,dailyrainin=0.22[/b],pressure=101712.50,batt_lvl=4.34,light_lvl=0.54,#
The single part of focus for now is the rain;
“dailyrainin=0.22” ` each bucket tip shows an increase of 0.01” on time every time, (wind also works when connected).

When the shield is mounted to the M4 airlift the data reads:

Code: Select all

$,winddir=-1,windspeedmph=0.0,windgustmph=0.0,windgustdir=0,windspdmph_avg2m=0.0,winddir_avg2m=0,windgustmph_10m=0.0,windgustdir_10m=0,humidity=48.6,tempf=-1766.2,[b]rainin=0.00,dailyrainin=0.00[/b],pressure=101689.75,batt_lvl=12.13,light_lvl=0.58,#
Key issue being:
"tempf=-1766.2,rainin=0.00,dailyrainin=0.00" ~ regardless of activity

I've tried connecting the SCL and SDA pins across respectively, but this hasn’t made a difference, the key issue appears to be around Pin 2 as it is not recognising the reed switch in the bucket at all.

Has anyone come across this or knows of a Pinout/ difference that I have missed?

Any ideas would be greatly appreciated

parts reffered to are here:

Adafruit Metro M4 Express AirLift (WiFi)
https://www.adafruit.com/product/4000

Adafruit Metro M4 Express AirLift (WiFi) pinout
https://learn.adafruit.com/assets/111278

Weather Shield
https://www.sparkfun.com/products/13956

Weather Shield Schematic
https://cdn.sparkfun.com/assets/1/1/4/d ... ld_V12.pdf
Attachments
the rain bucket
the rain bucket
IMG_0072.JPG (124.4 KiB) Viewed 137 times
shield in situ
shield in situ
IMG_0044.JPG (294.42 KiB) Viewed 137 times

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dastels
 
Posts: 15656
Joined: Tue Oct 20, 2015 3:22 pm

Re: Metro M4 Airlift issues with Weather Shield

Post by dastels »

The schematic shows that the connections to the controller board (e.g. UNO) are 5v logic. The Metro M4 Airlift uses 3.3v logic. This explains the warning on the shield product page:
Note: This shield was designed for the SparkFun RedBoard and Arduino Uno and will not work with other boards (like the Arduino Yun, for example) without modification.
.

So that shield isn't compatible with any UNO pinout M0 or M4 board.

Dave

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Infinite
 
Posts: 4
Joined: Sun May 17, 2015 9:22 am

Re: Metro M4 Airlift issues with Weather Shield

Post by Infinite »

Noted, that makes sense, thank you kindly

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