Ebyte E22-230T33S - 4 Recommended connection diagram; 4.2 E22-230 T33 S

Chengdu Ebyte Electronic Technology Co.,Ltd. E22-230TXXS User Manual
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8
pull-up)
suspended, if not grounded)
11
ANT
output
Antenna interface (high-frequency signal output, 50 ohm characteristic
impedance)
12
GND
Fixed to
13
GND
Fixed to
14
GND
Fixed to
18
P1.6
Input / output
NC pin, which must be suspended (for subsequent extension)
19
P1.5
Input / output
NC pin, which must be suspended (for subsequent extension)
20
P2.7
Input / output
NC pin, which must be suspended (for subsequent extension)
21
+3.3V
import
Power pin for program loading (user connected, suspended, and not
available as power)
22
C2D
import
Data pins during program loading (overhang, user without connection)
23
GND
import
Module ground wire
24
C2CK
import
Clock pin for program loading (suspended, user without connection)
4 Recommended connection diagram
4.2 E22-230T33S