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ESP01 Send & Receive Circuit

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David Conran edited this page Apr 12, 2019 · 3 revisions

(Provided by @DiggiD)

The circuit is quite simple, similar to many IR blasters online.

Receiver

Output PIN of TSOP IR receiver is connected to GPIO-0 or 2 (without pullup resistor as TSOP pin pulls up anyways).

Sender

To avoid problems with GPIO-0/2 stability, use GPIO-3 (RX port) for IR output directly connected to the base of a 2n2222 transistor. IR LED anode is connected to VCC with 10-100 Ohm current limiting resistor and cathode is connected to the collector of 2n2222 and Emitter to GND.

Circuit Diagram

VCC=3.3v

IR Sender & Receiver circuit for the ESP-01

(Diagram by @glmnet)

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