Do these support I2C? I notice that other NodeMCU boards don't - Thanks for showing that with the other boards BTW.

Yes they work on i2c. D1 and D2. Be sure to always use pull up resistors. 2.2k is okay with 3v3 but 4.7k works

I see only tx and rx. Should there not be 4 serial ports (normal rs232 ttl)?

Unfortunately I cant answer now

Do I need an arduino to program the ESP or can I just connect it with a usb? What do I need to do in the IDE to program it?

Youneed to go to boards -> board manager, and search for NodeMCU.. When its done you need to install the 'esp8266' and youre done. :)

What is the pinout for this board?

You can check every thing you want on *****

When will it be back in stock?

you can use the button “Arrival Notice” on the page. when it back in stock, you will receive an email notification.

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Geekcreit

Geekcreit® NodeMcu Lua WIFI Internet Things Development Board Based ESP8266 CP2102 Wireless Module

Name: Geekcreit® NodeMcu Lua WIFI Internet Things Development Board Based ESP8266 CP2102 Wireless Module
Brand: Geekcreit
SKU: bg-1097112
Price: 2000 INR
Availability: InStock
Rating: 5.0 (1188 reviews)

5.01,188 ratings

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Electronics for everyday users

The Geekcreit® NodeMcu Lua WIFI Internet Things Development Board Based ESP8266 CP2102 Wireless Module by Geekcreit is a mid-range electronics designed for everyday users. Customers praise its excellent build quality and great value for money. 100% of buyers rate it 4★ or above.

✓ excellent build quality✓ great value for money✓ fast and responsive✓ clear and bright display✓ wireless convenience

₹2,000

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SKU: bg-1097112Category: Electronics

About This Product

The Geekcreit® NodeMcu Lua WIFI Internet Things Development Board Based ESP8266 CP2102 Wireless Module by Geekcreit is a mid-range electronics designed for everyday users. Customers highlight its excellent build quality and great value for money.

Customer Verdict

100% of buyers rated this product 4 stars or above. The most appreciated qualities are: excellent build quality, great value for money, fast and responsive, clear and bright display.

Why Buy from Pricio?

Pricio sources this product directly, cutting out multiple middlemen. Every order includes free shipping, a 15-day return policy, and secure payment via Razorpay.

Description:
Material: Experimental Board + Mixed Alloy Color: Black Chip Module: CP2102 Working Temperature: -40 ℃ ~ +125 ℃ Power Input: 4.5V ~ 9V (10VMAX), USB-powered Drive Type: Dual high-power H-bridge driver Current: continuous transmission ≈70mA (200mA MAX) Standby: <200uA Size: (L)X(W)4.8X2.5cm/1.89''X0.98''(appr.)
Features:
A great set of tools to develop ESP8266. ESP8266 has IO Pin. ESP8266 full IO mouth leads directly download without resetting. Open-source, interactive, programmable, low cost, simple, smart, WI-FI enabled. Greatly speed up your IOT application developing process.

Documentation:

You can find the firmware source code and documentation on Github, as well as nodemcu-flasher, a Windows only tools to flash the firmware to a module. There’s also a separate tool called esptool that will let you flash nodemcu from Linux. If you find the documentation is all over the place, you might want to checkout NodeMCU video tutorial below.

Nodemcu.com is the official website for the project, but you’ll find more information on Github. You can also get answers to your questions on their BBS or ESP8622 community forums.

Package included:
1 x ESP8266 CP2102 Development Board

Product Safety Information

Setup Guide

Identify the pins

Locate VCC (power), GND (ground), and data pins (SDA/SCL for I2C, MOSI/MISO for SPI, or TX/RX for UART). Refer to the pinout diagram on the product page.

Wire to your microcontroller

Connect VCC to 3.3V or 5V (check the module spec), GND to GND, and data pins to the appropriate GPIO pins on your Arduino or Raspberry Pi.

Install libraries

In Arduino IDE, go to Sketch → Include Library → Manage Libraries and search for the sensor library. Install the recommended version.

Upload example sketch

Open File → Examples → [library name] → Basic Example. Upload to your board and open Serial Monitor to view output.

Calibrate if needed

Some sensors (temperature, humidity, distance) may need a short warm-up period or calibration. Run the calibration sketch if provided.

Geekcreit® NodeMcu Lua WIFI Internet Things Development Board Based ESP8266 CP2102 Wireless Module

About This Product

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Setup Guide

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