Tech/Interface/USB-TTL-dat/USB-TTL-dat.md
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@@ -15,7 +15,12 @@
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## Use case
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-for ESP32 or ESP8266 : TXD -> RXD, RXD -> TXD, 5V -> 5V, GND -> GND. setup IO0 to GND to enter into programming mode
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+### for ESP32 or ESP8266 :
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+- TXD -> RXD
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+- RXD -> TXD
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+- 5V -> 5V
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+- GND -> GND.
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+- Connect IO0 to GND, and then power up to enter into programming mode
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### troubleshooting checklist
chip-cn/Espressif/ESP32/ESP32-HDK-dat/ESP32-HDK-dat.md
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## pins
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-- U0 = RXD0 / TXD0
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-- U1 = SD2 / SD3 (can not use)
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-- U2 = U2RXD = IO16, U2TXD = IO17
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-
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+### RMT
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-
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-## RMT
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-
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-RMT
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- RMT_SIG_IN0~7
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- Any GPIO Pins
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- Eight channels for an IR transmitter and
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- RMT_SIG_OUT0~7 receiver of various waveforms
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- [[infrared-dat]]
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-## ESP32 Serial
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-- [[ESP32-SPI-dat]]
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-- [[BTB-dat]]
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+
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+### Serial
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+
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+- U0 = RXD0 / TXD0
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+- U1 = SD2 / SD3 (can not use)
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+- U2 = U2RXD = IO16, U2TXD = IO17
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+### SPI
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+
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+- [[ESP32-SPI-dat]]
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## Modules
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+- [[ESP32-WROOM-dat]] - [[ESP32-C3-dat]]
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+
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+
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+## ref
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-- [[ESP32-WROOM-dat]] - [[ESP32-C3-dat]]
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+- [[BTB-dat]]
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