Page 7 of 15 pages
EGBT-046S/EGBT-045MS Bluetooth Module
e-Gizmo Mechatronix Central
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Figure 7.
EGBT-045MS wiring example with a 3v3 host microcontroller. The 470R resistors and LEDs are for
status indication, and may be omitted if not needed. The microcontroller can switch the EGBT-045MS between
command mode and data mode at any time by setting the CMD pin accordingly.
Figure 8.
EGBT-045MS RX input is not 5V tolerant. A schottky diode connected as shown will keep 5V volt-
ages out of the Bluetooth module when operated with a 5V host microcontroller. The transistor circuit takes on
a similar function for the CMD pin.
