Specifications

ESP-13U Specification V1.0
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XIII
8 IO0 GPIO0；download mode: external pull down，
operating/running mode: suspension or external pull up
9 13 18 GND Ground
10 IO4 GPIO4
11 RXD UART0_RXD/GPIO3
12 TXD UART0_TXD/GPIO1
14 IO5 GPIO5/IR_R
15 RST Reset
16 TOUT ADC port
17 IO16 GPIO16/ can wake up deep sleep when you connect RST pin
Table Description of the ESP series module boot mode
Mode CH_PD(EN) RST GPIO15 GPIO0 GPIO2 TXD0
Download
mode
High High Low Low High High
Operating
mode
High High Low High High High
Note：Some of the pins inside the module had been pulled up or pulled down，Please refer to the schematic
diagram.