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Original post by: Pierre Michael ,



The coin cell battery is for the real time clock, a device that keeps track of time so that if your bot is unplugged, your trending history will remain accurate.

The easiest way to troubleshoot this is to plug a monitor or TV into the raspberry pi's HDMI port. If you see text streaming after you apply power, then you know the SD card and RPI are good. If you don't see text, then the RPI or SD card are suspect.

Let me know what you determine.