Saving Pictures from Feather HUZZAH to IO Moderators: adafruit_support_bill, adafruit

[francis66]

Hi,

I've been trying to get a project working for months using the IO Home Security learning project as my foundation. My project also uses the learning project for a solar powered setup for my Feather HUZZAH since I do not have a power supply where this will be used (but it's in range of WiFi). The IO Home Security project example jumps over to the Raspberry Pi Zero W and Python programs for snapping pictures which I learned the hard way is a huge drain on battery power even when the Pi is turned off. I learned a bit, but in the end this was a wasted investment for my project since the solar panels can't produce enough juice to keep the Pi powered. So I persisted and bought the Mini TTL Serial JPEG Camera (VC0706) for use with my Feather HUZZAH. With some trial and error I have been able to get the Arduino program to successfully snap pictures and move the JPEG from the Camera to the HUZZAH. I even got it working to convert the image to Base 64 using help from another project I found on Github. I know it's working because if I copy & paste the converted string to my IO picture object and manually Add the Data, the picture appears. What I can't get working is the feed-->save() function using the MQTT client. I get a Stack overflow even when using the smallest image size possible (160x120). Does Adafruit have any examples of how to upload a picture to IO for a Feather HUZZAH?

[brubell]

What I can't get working is the feed-->save() function using the MQTT client. I get a Stack overflow even when using the smallest image size possible (160x120). Does Adafruit have any examples of how to upload a picture to IO for a Feather HUZZAH?

Ok, let's try a few things. First, for the feed you're saving the image to - is the feed's history turned OFF?

[francis66]

Yes, feed history is turned off. When I followed the IO Home Security series I was able to successfully get the same feed working using the Pi Zero W and Python programs. When I use the Arduino client, even if I try saving the image in string form the program crashes with a stack dump. Example with full string cut out:
feedname->save("/9j//gAkywBSHwAAAA..........");

[brubell]

You might want to try including these two files, they're from the esp8266 websocket server code - https://github.com/fcgdam/ESP8266-base64

If you're still being presented with a stack dump, you should install the ESPExceptionDecoder and paste the output from the stack trace. I can help you debug more if I have more context:

https://github.com/me-no-dev/EspExceptionDecoder