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Arduino Sensor Board: Difference between revisions

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{{ProductInfo
{{ProductInfo
|title=ESP8266 2.42" OLED Clock Board(blue)
|title=ESP8266 2.42inch OLED Temperature Humidity Clock Board(blue)
|model=2.42" OLED Clock Board
|model=2.42" OLED Clock Board
|status=Published
|status=Published
Line 6: Line 6:
|image1=ESP8266 2 42 clock-800-600-1.jpg
|image1=ESP8266 2 42 clock-800-600-1.jpg
|image2=ESP8266 2 42 clock-800-600-2.jpg
|image2=ESP8266 2 42 clock-800-600-2.jpg
|intro=SSD1309,I2C
|intro=SSD1309, I2C, BLUE
|highlights=* Provides display, serial bus, and general-purpose I/O expansion.
|highlights=The ESP8266 2.42" OLED Desk Clock is a multifunctional network clock board from OLIGHKER. Based on the ESP-12F Wi-Fi module, it integrates a 2.42-inch 128×64 OLED display, temperature/humidity and barometric pressure sensors, an RGB status LED, an active buzzer and one-touch Wi-Fi provisioning — usable as a desktop clock and as an entry-level ESP8266 IoT development platform.
* Suitable for driver verification, teaching, and prototyping.
* Page does not correspond to any specific brand or commercial model.
* Standalone product ID: 2.
|videoTitle=2.42" OLED Clock Board
|videoTitle=2.42" OLED Clock Board
|videoURL=https://youtu.be/ttgwL_DnFwQ
|videoURL=https://youtu.be/ttgwL_DnFwQ
|hardware=[[File:ESP8266 2 42 clock-800-600-3.jpg|center|thumb|800x800px]]
|specs={{{!}} class="wikitable"
{{!}}+Hardware Resources
!ESP-12F module
!Main controller with integrated ESP8266 Wi-Fi / MCU
!—
{{!}}-
{{!}}2.42" OLED
{{!}}128×64 dot-matrix SSD1309 display
{{!}}I2C 0x3C
{{!}}-
{{!}}AHT20-F
{{!}}<div>Digital temperature and humidity sensor</div>
{{!}}I2C 0x38
{{!}}-
{{!}}BMP280
{{!}}Digital barometric pressure sensor
{{!}}I2C 0x76/0x77
{{!}}-
{{!}}WS2812B
{{!}}Full-colour RGB status LED
{{!}}GPIO12
{{!}}-
{{!}}BEEP
{{!}}Active buzzer for the alarm
{{!}}GPIO14
{{!}}-
{{!}}PWR LED
{{!}}Power indicator LED
{{!}}—
{{!}}-
{{!}}USER LED
{{!}}User indicator LED
{{!}}GPIO2
{{!}}-
{{!}}SELECT button
{{!}}Short press: change page, alarm snooze/dismiss
{{!}}GPIO16
{{!}}-
{{!}}BOOT button
{{!}}Hold 3 s to show the setup hotspot info
{{!}}GPIO0
{{!}}-
{{!}}RST button
{{!}}Reset button
{{!}}—
{{!}}-
{{!}}USB-C
{{!}}Type-C power + CH340C serial port
{{!}}—
{{!}}-
{{!}}Expanded I/O
{{!}}2.54 mm header exposing GPIO pins
{{!}}See code definitions
{{!}}-
{{!}}4× mounting holes
{{!}}M3 through-holes for enclosure mounting
{{!}}—
{{!}}}
|hardware=[[File:ESP8266_2_42_clock-800-600-3.jpg|center|thumb|800x800px]]
 
=== '''<span style="color: rgb(52, 176, 176);">1. First Use and Wi-Fi Setup</span>''' ===
On power-up the device enters AP+STA concurrent mode: it starts the configuration hotspot DeskClock-XXXXXX and at the same time tries to connect to the last saved home Wi-Fi.
 
=== <span style="color: rgb(52, 176, 176);">1.1 '''Setting up Wi-Fi with a phone'''</span> ===
1. Open Wi-Fi settings on your phone and join the hotspot named DeskClock-XXXXXX; the password is fixed at 88888888.
 
2. If the phone reports that the hotspot has no internet, stay connected anyway; open <nowiki>http://192.168.4.1/</nowiki> in a browser (some phones pop the page up automatically).
 
3. After the page loads, choose or scan for a 2.4 GHz Wi-Fi network, enter its password and tap “Connect & continue”.
 
4. Once connected, the device immediately saves the verified credentials; continue configuring the time zone, alarm and weather city.
 
5. Tap “Save & restart” — all settings are written to Flash with read-back verification, and the device restarts automatically in about 2 seconds.
 
'''Note:''' The setup hotspot is available from power-on and never closes when the home Wi-Fi connects; its password is fixed at 88888888. When uploading a sketch, set Erase Flash in the Arduino IDE to “Only Sketch”, otherwise the saved Wi-Fi passwords will be erased.
 
=== '''<span style="color: rgb(52, 176, 176);">1.2 Development environment</span>''' ===
To modify or extend the firmware, select NodeMCU 1.0 (ESP-12E Module) in the Arduino IDE, set CPU Frequency to 160 MHz, set Erase Flash to Only Sketch, and install ESP8266 Core 3.0.1 together with the U8g2 library. The NeoPixel driver and the single-file ArduinoJson library are already bundled.
{{{!}} class="wikitable"
{{!}}+Settings
!Board
!NodeMCU 1.0 (ESP-12E Module)
{{!}}-
{{!}}CPU frequency
{{!}}160 MHz
{{!}}-
{{!}}Flash erase
{{!}}Only Sketch
{{!}}-
{{!}}Serial baud rate
{{!}}115200
{{!}}}
|usage=[[File:ESP8266 2 42 clock-600-300-1.jpg|center|thumb|600x600px]]
|usage=[[File:ESP8266 2 42 clock-600-300-1.jpg|center|thumb|600x600px]]
|faq=; What if unable to enter download mode?
|faq==== <span style="color: rgb(52, 176, 176);">Q1:No display after power-on</span> ===
: Check boot button timing, USB driver, and data cable.
Check that the USB-C power supply is working; view the boot log at 115200 baud and confirm that the I2C scan finds address 0x3C.
; What if peripheral communication is unstable?
 
: Verify logic levels, ground, bus speed, and terminal connections.
=== <span style="color: rgb(52, 176, 176);">Q2:Cannot open the setup page</span> ===
Make sure the phone is connected to the DeskClock-XXXXXX hotspot with password 88888888, then open <nowiki>http://192.168.4.1/</nowiki>.
 
=== <span style="color: rgb(52, 176, 176);">Q3:Wi-Fi reports an authentication failure</span> ===
reason 15/202/204 means the password or handshake failed; re-enter the password and tap “Connect & continue”.
 
=== <span style="color: rgb(52, 176, 176);">Q4:The clock keeps waiting for time sync</span> ===
The device has not connected to an internet-enabled Wi-Fi or NTP is blocked; check that the router allows access to ntp.aliyun.com and pool.ntp.org.
 
=== <span style="color: rgb(52, 176, 176);">Q5:Weather does not update</span> ===
Make sure Wi-Fi is online and time sync has completed; the first weather request starts only after 60 seconds of stable connection; TLS errors can be found in the serial log.
 
=== <span style="color: rgb(52, 176, 176);">Q6:The alarm does not ring</span> ===
Check that the alarm is enabled and the time is set correctly; in weekdays-only mode it does not trigger on Saturday or Sunday.
|dl1Type=Demo
|dl1Name=A8266 Clock 2 42 oled V20.zip
|dl1File=A8266 Clock 2 42 oled V20.zip
|dl2Type=Document
|dl2Name=ESP8266 2.42 Desk Clock User Manual EN V10.pdf
|dl2File=ESP8266 2.42 Desk Clock User Manual EN V10.pdf
|dl3Type=Document
|dl3Name=ESP8266 2.42 Desk Clock User Manual RU V10.pdf
|dl3File=ESP8266 2.42 Desk Clock User Manual RU V10.pdf
|dl4Type=Document
|dl4Name=A8266 clock 2 42 oled SchDoc V20.pdf
|dl4File=A8266 clock 2 42 oled SchDoc V20.pdf
|displayMode={{{displayMode|详情}}}
|displayMode={{{displayMode|详情}}}
|cardPage={{{cardPage|{{PAGENAME}}}}}
|cardPage={{{cardPage|{{PAGENAME}}}}}

Latest revision as of 16:33, 17 October 2026

Edit Product

ESP8266

2.42" OLED Clock Board
Published
SSD1309, I2C, BLUE
ESP8266 2.42inch OLED Temperature Humidity Clock Board(blue) Main View
ESP8266 2.42inch OLED Temperature Humidity Clock Board(blue) Auxiliary View

Introduction

The ESP8266 2.42" OLED Desk Clock is a multifunctional network clock board from OLIGHKER. Based on the ESP-12F Wi-Fi module, it integrates a 2.42-inch 128×64 OLED display, temperature/humidity and barometric pressure sensors, an RGB status LED, an active buzzer and one-touch Wi-Fi provisioning — usable as a desktop clock and as an entry-level ESP8266 IoT development platform.

Specifications

Hardware Resources
ESP-12F module Main controller with integrated ESP8266 Wi-Fi / MCU —
2.42" OLED 128×64 dot-matrix SSD1309 display I2C 0x3C
AHT20-F
Digital temperature and humidity sensor
 I2C 0x38
BMP280 Digital barometric pressure sensor I2C 0x76/0x77
WS2812B Full-colour RGB status LED GPIO12
BEEP Active buzzer for the alarm GPIO14
PWR LED Power indicator LED —
USER LED User indicator LED GPIO2
SELECT button Short press: change page, alarm snooze/dismiss GPIO16
BOOT button Hold 3 s to show the setup hotspot info GPIO0
RST button Reset button —
USB-C Type-C power + CH340C serial port —
Expanded I/O 2.54 mm header exposing GPIO pins See code definitions
4× mounting holes M3 through-holes for enclosure mounting —

Hardware

1. First Use and Wi-Fi Setup

On power-up the device enters AP+STA concurrent mode: it starts the configuration hotspot DeskClock-XXXXXX and at the same time tries to connect to the last saved home Wi-Fi.

1.1 Setting up Wi-Fi with a phone

1. Open Wi-Fi settings on your phone and join the hotspot named DeskClock-XXXXXX; the password is fixed at 88888888.

2. If the phone reports that the hotspot has no internet, stay connected anyway; open http://192.168.4.1/ in a browser (some phones pop the page up automatically).

3. After the page loads, choose or scan for a 2.4 GHz Wi-Fi network, enter its password and tap “Connect & continue”.

4. Once connected, the device immediately saves the verified credentials; continue configuring the time zone, alarm and weather city.

5. Tap “Save & restart” — all settings are written to Flash with read-back verification, and the device restarts automatically in about 2 seconds.

Note: The setup hotspot is available from power-on and never closes when the home Wi-Fi connects; its password is fixed at 88888888. When uploading a sketch, set Erase Flash in the Arduino IDE to “Only Sketch”, otherwise the saved Wi-Fi passwords will be erased.

1.2 Development environment

To modify or extend the firmware, select NodeMCU 1.0 (ESP-12E Module) in the Arduino IDE, set CPU Frequency to 160 MHz, set Erase Flash to Only Sketch, and install ESP8266 Core 3.0.1 together with the U8g2 library. The NeoPixel driver and the single-file ArduinoJson library are already bundled.

Settings
Board NodeMCU 1.0 (ESP-12E Module)
CPU frequency 160 MHz
Flash erase Only Sketch
Serial baud rate 115200

Size

FAQ

Q1:No display after power-on

Check that the USB-C power supply is working; view the boot log at 115200 baud and confirm that the I2C scan finds address 0x3C.

Q2:Cannot open the setup page

Make sure the phone is connected to the DeskClock-XXXXXX hotspot with password 88888888, then open http://192.168.4.1/.

Q3:Wi-Fi reports an authentication failure

reason 15/202/204 means the password or handshake failed; re-enter the password and tap “Connect & continue”.

Q4:The clock keeps waiting for time sync

The device has not connected to an internet-enabled Wi-Fi or NTP is blocked; check that the router allows access to ntp.aliyun.com and pool.ntp.org.

Q5:Weather does not update

Make sure Wi-Fi is online and time sync has completed; the first weather request starts only after 60 seconds of stable connection; TLS errors can be found in the serial log.

Q6:The alarm does not ring

Check that the alarm is enabled and the time is set correctly; in weekdays-only mode it does not trigger on Saturday or Sunday.

Downloads

Demo

A8266 Clock 2 42 oled V20.zip

Download
Document

ESP8266 2.42 Desk Clock User Manual EN V10.pdf

Download
Document

ESP8266 2.42 Desk Clock User Manual RU V10.pdf

Download
Document

A8266 clock 2 42 oled SchDoc V20.pdf

Download





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This page was last edited on 17 October 2026, at 16:33.
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