topic Re: Get Snapshot Image in Code Exchange

Get Snapshot Image

Elanp — Sun, 26 Jul 2026 18:19:40 GMT

I am able to generate a snapshot of a camera using the /devices/{serial}/camera/generateSnapshot endpoint and receive a 202 response with a snapshot url and expiry time. However when I make a GET request to the snapshot url that was returned, it gives me a 400 error with a response of

'<?xml version="1.0" encoding="iso-8859-1"?>\n<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"\n "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">\n<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">\n <head>\n <title>400 Bad Request</title>\n </head>\n <body>\n <h1>400 Bad Request</h1>\n </body>\n</html>'

How do I get the actual image bytes once it is generated?

Thank you

Re: Get Snapshot Image

Philip D'Ath — Sun, 26 Jul 2026 20:40:58 GMT

I find that the snapshot is not available immediately after calling generateSnapshot. You have to wait for the camera to generate it and then upload it. Think of generateSnapshot more like a queued request.

You'll need to implement a delay and retry logic to fetch it.

Re: Get Snapshot Image

Elanp — Mon, 27 Jul 2026 14:10:36 GMT

Thank you Philip,

Do you know what I can expect for a standard snapshot generation time? I am creating a wait for 10-15 minutes, but am still getting a 400. Additionally, I will be trying to generate snapshots for multiple cameras simultaneously. Will this cause any performance issues? Can you elaborate as to the general expectations I should have regarding the snapshot generation performance?

Re: Get Snapshot Image

Philip D'Ath — Mon, 27 Jul 2026 20:26:18 GMT

15 to 120s.

Once you have the snapshot URL, try loading it in your web browser.

You can generate lots of snapshot requests for different cameras at the same time.

Re: Get Snapshot Image

Philip D'Ath — Mon, 27 Jul 2026 20:28:44 GMT

I found some old code that I wrote a long time ago. This used the old API, so the code no longer works "as-is", the concepts are still the same.

Actually, looking at it again - it might still work.

https://ifm.net.nz/cookbooks/meraki-icu.html