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The prototyping area is available for soldering sensors and wires. It uses a 3.3V level shifter for fast read/write and SD card protection. Project Hardware. RTC Battery: CR1220 3V. Useful Links. coming soon.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.