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→Components: Sens 4 is a capacitive RH sensor
U21 - TI/Chipcon CC1050 (TSSOP 24)
Sens 4 - Capacitive Relative humidity sensor
===Notes===
U16 Package marking shows C22A. TI Part marking lookup provides LMV761. The SOT-23 footprint appears to match what is on the PCB.
Sens 4 is know to be capacitive since it is listed as such on page 13 of the [https://web.archive.org/web/20200619153019/https://www.wmo.int/pages/prog/www/WMOCodes/WMO306_vI2/LatestVERSION/WMO306_vI2_CommonTable_en.pdf WMO Common Code Tables Document]
==Circuits==
RF from CC to Ant1 - coming soon
