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For revision history of this document, please refer to the last page. Documentation Change Notification Espressif provides email notifications to keep you updated on changes to technical documentation. Please sub- scribe at www.espressif.com/en/subscribe. Certification Download certificates for Espressif products from www.espressif.com/en/certificates.
Create Your First Project 2.4.1 Start a Project 2.4.2 Connect Your Device 2.4.3 Configure 2.4.4 Build the Project 2.4.5 Flash onto the Device 2.4.6 Monitor U.S. FCC Statement Learning Resources Must-Read Documents Important Resources Revision History Espressif Systems ESP8685-WROOM-03 User Manual v0.1...
1 Overview 1 Overview 1.1 Module Overview ESP8685-WROOM-03 is a general-purpose Wi-Fi and Bluetooth LE module. The rich set of peripherals and a small size make this module an ideal choice for smart homes, industrial automation, health care, consumer electronics, etc.
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High: on, enables the chip. Low: off, the chip powers off. Default: internally pulled-up I/O/T GPIO21, U0TXD I/O/T GPIO20, U0RXD Ground Power supply I/O/T GPIO9 P: power supply; I: input; O: output; T: high impedance. Espressif Systems ESP8685-WROOM-03 User Manual v0.1...
ESP-IDF Programming Guide. 2.2 Hardware Connection 1. Solder the ESP8685-WROOM-03 module to the RF testing board as shown in Figure 2. Figure 2: Hardware Connection 2. Connect the RF testing board to the USB-to-Serial board via TXD, RXD, and GND.
2 Get Started on ESP8685-WROOM-03 7. After download, remove the jumper on IO9 and GND. 8. Power up the RF testing board again. ESP8685-WROOM-03 will switch to working mode. The chip will read programs from flash upon initialization. Note: IO9 is internally logic high. If IO9 is set to pull-up, the Boot mode is selected. If this pin is pull-down or left floating, the Download mode is selected.
2.4.2 Connect Your Device Now connect your ESP8685-WROOM-03 module to the computer and check under what serial port the module is visible. Serial ports in Linux start with ‘/dev/tty’ in their names. Run the command below two times, first with the board unplugged, then with plugged in.
2 Get Started on ESP8685-WROOM-03 Setting the target with ‘idf.py set-target esp8685’ should be done once, after opening a new project. If the project contains some existing builds and configuration, they will be cleared and initialized. The target may be saved in environment variable to skip this step at all.
If there are no errors, the build will finish by generating the firmware binary .bin file. 2.4.5 Flash onto the Device Flash the binaries that you just built onto your ESP8685-WROOM-03 module by running: idf.py -p PORT [-b BAUD] flash Replace PORT with your module‘s serial port name from...
Restarting in 7 seconds... To exit IDF monitor use the shortcut Ctrl+]. That’s all what you need to get started with ESP8685-WROOM-03 module! Now you are ready to try some other examples in ESP-IDF, or go right to developing your own applications.
As long as 3 conditions above are met, further transmitter test will not be required. However, the OEM integrator is still responsible for testing their end-product for any additional compliance requirement with this module installed (for example, digital device emission, PC peripheral requirements, etc.) Espressif Systems ESP8685-WROOM-03 User Manual v0.1...
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The end product (including the transmitter) and obtaining a separate FCC authorization. The final end product must be labeled in a visible area with the following: “Contains Transmitter Module FCC ID: 2AC7ZESP868503 or Contains FCC ID: 2AC7ZESP868503”. Espressif Systems ESP8685-WROOM-03 User Manual v0.1...
4.2 Important Resources Here are the important -related resources. • ESP32 BBS Engineer-to-Engineer (E2E) Community for Espressif products where you can post questions, share knowl- edge, explore ideas, and help solve problems with fellow engineers. Espressif Systems ESP8685-WROOM-03 User Manual v0.1...
Revision History Revision History Date Version Release notes 2021-12-27 V0.1 Preliminary release Espressif Systems ESP8685-WROOM-03 User Manual v0.1...
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