Schematics

S3
L
S4
B
S5
F
S2
R
B T1
3.0V
Y1
16 M
C4
0.1u
C1
0.1u
TX1
ANTEN NA
D1
LED
R1
1K
S1
ON/OFF
C3
10 0p
C2
1.2P
ANT
1
RF_V PB5 PB6 PB7 MCU_V PA7 PA6
8
PA5
9
PA3 PA4 PA0 PB0
XC1 XC2
GND
16
U1
TX2A-2.4G
R2 0R
L1
1.5u H
SME991B-SDJ668