Eufy-Security-Entry-Sensor-teardown
A look inside the Eufy Security Entry Sensor.
At the heart of the sensor is a CC1310 micro, SimpleLink™ 32-bit Arm Cortex-M3 Sub-1 GHz wireless MCU with 128kB Flash. The link to the Texas Instruments datasheet is here.
The Antenna is a Helical design that gives the device a great range from the Homebase.
The Battery is a CR123A that gives a 2 year life span before replacement is needed. (as documented in the eufy website)