M5Stack M5Stamp C3U Mate with Pin Headers - OpenELAB

M5Stack M5Stamp C3U Mate with Pin Headers

SKU: M5-K122

€7,51

incl. VAT

Type: 1 Pcs

1 Pcs 5 Pcs

Product variants

Quantity

In Stock & Ready to Ship

📦 From 50€ in Germany, 100€ in the EU,45€ in the US!

🚀

Express Shipping Available:
Need it faster? Contact us via phone or email for expedited delivery.

Guarantee & Return Policy

Effective Date: December 10, 2025

At OpenELAB, we are committed to providing accurate product descriptions and high-quality electronics. The following policy outlines your rights and obligations, designed to be fair to both our customers and our business operations globally.

1. Warranty Policy

A. Standard Limited Warranty (Global & US)

For customers in the United States, Asia, and other non-EU regions:

Warranty Period: OpenELAB provides a 12-month warranty from the date of delivery.
Coverage: This warranty covers defects in material and workmanship under normal use.
Resolution: We will repair or replace defective units at no charge.

B. Statutory Rights for EU/UK Customers (EU Compliance)

If you are a consumer residing in the European Union or the UK purchasing from our global site:

Statutory Guarantee: You are entitled to a 24-month statutory guarantee for conformity defects present at the time of delivery, in accordance with EU consumer protection laws.
Relation: The Standard Limited Warranty (Section 1.A) applies in addition to, and does not replace, your statutory rights.

C. Warranty Exclusions (Applies to ALL Regions)

Warranty coverage is VOID if the damage is caused by:

Misuse: Incorrect installation, reverse polarity, or exceeding voltage limits.
Unauthorized Modification: This explicitly includes soldering, cutting pins, modifying the PCB, or flashing unauthorized/beta firmware that "bricks" the device.
Physical Damage: Drops, moisture/water damage, or electrical surges (lightning).
Normal Wear & Tear: Consumable parts (e.g., batteries), unless defective upon arrival.

Note: For non-warranty repairs (e.g., customer-induced damage), we may offer repair services for a fee. Shipping and diagnostic costs will be borne by the customer.

2. Return & Refund Policy

A. Return Window

Standard: You may request a return within 30 days of receiving your order.
EU Customers: You have the statutory right to withdraw from the contract within 14 days of receipt without giving a reason.

B. Refund Conditions & Restocking Fees

To protect against policy abuse, the refund amount is strictly determined by the condition of the returned item.

1. Full Refund (100%)

The item is Brand New, Unopened, and Unused.
The original packaging is intact and sealed.
All accessories are present.

2. Partial Refund (Restocking Fee / Value Depreciation)
If the item is returned in a condition that prevents it from being sold as new, OpenELAB reserves the right to deduct a Restocking Fee (or "Compensation for Loss of Value" for EU customers) from the refund.
Deductions apply if:

Signs of Use: Visible scratches, mounting marks on screw holes, or fingerprints.
Damaged Packaging: Original box is torn, written on, or missing.
Technical Modification: The device has been powered on, programmed/flashed, or soldered.
Broken Seals: Anti-static bags or security seals have been opened.

Depending on the severity of the usage/damage, the deduction may range from 15% to 50% of the product price. Items damaged beyond repair due to misuse will not be refunded.

C. Shipping Costs

Defective / Wrong Item: OpenELAB covers the return shipping cost.
Customer Remorse (Changed Mind / Ordered Wrong Item): The customer is responsible for all return shipping costs to our designated return center (located in the US, Germany, or China, depending on your region). Original shipping fees are non-refundable unless required by local law.

3. Return Process (RMA)

To ensure a smooth return process, please follow these steps:

Authorization: Contact us at info@openelab.io before returning any item. Returns without prior authorization will not be accepted.
RMA Number: We will provide you with a Return Merchandise Authorization (RMA) number and the correct return address.
Packing: Ship the item back in its original packaging with the RMA number clearly marked on the shipping label (not on the product box).
Tracking: We strongly recommend using a trackable shipping method. OpenELAB is not responsible for returns lost in transit.

M5Stack M5Stamp C3U Mate with Pin Headers

The M5Stamp C3U is a highly compact IoT development module powered by the ESPRESSIF ESP32-C3 RISC-V microcontroller with Wi-Fi 5 (802.11 b/g/n) and BLE connectivity. Designed for smart home devices, industrial automation, and a wide range of embedded applications, it delivers reliable wireless performance in a small footprint.

Equipped with RSA-3072 secure boot and AES-128-XTS flash encryption, the M5Stamp C3U ensures high-level security for connected environments. Its durable plastic enclosure offers excellent heat resistance, making it suitable for operation in high-temperature industrial settings.

Key Features:

Microcontroller: 32-bit RISC-V ESP32-C3, up to 160 MHz
Memory: 400 KB internal RAM, 4 MB Flash
Connectivity: Wi-Fi 5 (802.11 b/g/n), BLE
Security: RSA-3072 secure boot, AES-128-XTS flash encryption
Form Factor: Ultra-compact, ideal for embedded IoT applications
Durability: Heat-resistant plastic casing for industrial environments

Product Features

MULTIPLE STYLE:
- Three types of soldering options are available (SMT, DIP, flywire);
- High-temperature resistant plastic enclosure, Peak temperature = 230℃;
HIGH INTEGRATION:
- M5Stamp C3 contains 5V->3.3V DC/DC design, GPIOx14;
- USB Type C port;
- Programmable RGB LED x1, Reset button x1, button x1;
- 3D antenna, providing stable and reliable wireless communication.
DEVELOPMENT PLATFORM:
- Arduino, ESP32-IDF (UIFlow support coming soon)

Include

M5Stamp C3U (5pcs):
- 5 x M5Stamp C3U
- 5 x Heat Resistant Sticker

Application

DIY, Prototyping
Industrial Automation
Smart Home
Wearable Devices
Medical Devices
Consumer Electronics

Note: The newly updated C3U shares the same features as the C3, but the difference is that the M5Stamp C3U without the USB download chip and the program download method is different（(The C3U uses the ESP32-C3's built-in USB Serial for program download)）. If you are looking for a more affordable project, you can add this to your shopping list!

Program Download/Notes

Enter the program download mode operation:
1. Long press the center button (G9) of STAMP C3U under power failure conditions.
2. Connect to the computer, after the port is successfully identified, program burning.
USB CDC enabled:
By default, USB CDC is not enabled, the serial port output started by C3U will be output through UART0, if you need to output through USB, please use IDE to make it USB CDC before downloading the program option enabled. (Arduino users can enable it through Tools->USB CDC on Boot-Enabled, IDF users please refer to ESP IDF official documentation.)

product comparison

Model	Master	IO quantity	Button IO	USB chip	USB interface function
STAMP-C3	ESP32-C3	13	G3	CH9102	Download / Serial
STAMP-C3U	ESP32-C3	14	G9	/	Download / JTAG / CDC Serial

Specifications

Specifications	Parameters
ESP32-C3	32bit RISC-V single-core processor clocked at 160 MHz
Storage	384KB ROM, 400KB SRAM, 8KB RTC SRAM, 4MB FLASH
Wi-Fi	2.4 GHz band supports 20 MHz and 40 MHz bandwidth, IEEE 802.11 b/g/n protocol, data rate up to 150 Mbps
Input voltage	5V @ 500mA
HMI	Programmable physical button x 1, reset debugging button x 1, programmable RGB LED (SK6812) x 1
USB interface	TypeC x1
Antenna Type	2.4G 3D Antenna
Module peripheral interface resources	ADC, GPIO, SPI, UART, I2C, I2S, PWM, RMT, DMA, USB serial port, TWAI
IO interface x14	G0, G1, G3, G4, G5, G6, G7, G8, G9, G10, G18, G19, G21, G22
IO interface spacing	2.54mm
Net weight	3.8g
Product size	34 * 20 * 4.6mm
Packing size	85*55mm sealing bag (translucent)

1. General Shipping Information

We provide premium shipping methods with a tracking number for each order.
Shipping addresses must be entered in English without special symbols to help the courier company recognize your address in the system. We will ship strictly according to the shipping address you provided. Please notify us of any address change before your order is marked "Shipped" to avoid parcel loss.
Please contact our customer service staff immediately if you need to cancel or change an order. Once your order has reached "Shipped" status, it can no longer be canceled or changed in any way. To avoid complications, please recheck your shopping cart before checkout.
We can ship all in-stock orders within 1 business day after your order has been confirmed.
All items are inspected before dispatch and are carefully hand-packed.
With standard courier practice, you need to check the contents of the parcel before signing for your goods. Otherwise, we will not be held responsible for any damage that may have occurred in transit.

🚀 Need Faster Shipping?

If you require expedited shipping (Express), please contact our customer support team at info@openelab.io for a customized quote tailored to your location.

2. Shipping Rates & Options

Our shipping rates are calculated based on the order value and destination. Please refer to the tables below for details.

2.1 Germany (Domestic)

Shipping Method	Order Value	Cost	Est. Delivery
Deutsche Post	€0 - €50.00	€4.95	2-4 Business Days
Deutsche Post	Over €50.00	Free	2-4 Business Days
DHL Paket (Faster Delivery)	€0 - €50.00	€6.95	1-3 Business Days
DHL Paket (Faster Delivery)	€50.00 - €100.00	€2.00	1-3 Business Days
DHL Paket (Faster Delivery)	Over €100.00	Free	1-3 Business Days

2.2 European Union (EU)*

*Including:

Åland Islands, Andorra, Austria, Belgium, Bosnia & Herzegovina, Bulgaria, Croatia, Czechia, Denmark, Estonia, Faroe Islands, Finland, France, Gibraltar, Greece, Guernsey, Hungary, Ireland, Isle of Man, Italy, Jersey, Latvia, Lithuania, Luxembourg, Malta, Moldova, Monaco, Montenegro, Netherlands, North Macedonia, Poland, Portugal, Romania, San Marino, Serbia, Slovakia, Slovenia, Spain, Svalbard & Jan Mayen, Sweden.*

Shipping Method	Order Value	Cost	Est. Delivery
Deutsche Post	€0 - €100.00	€7.95	5-9 Business Days
Deutsche Post	Over €100.00	Free	5-9 Business Days
DHL Paket (Faster Delivery)	€0 - €100.00	€15.95	3-7 Business Days
DHL Paket (Faster Delivery)	€100.00 - €250.00	€7.95	3-7 Business Days
DHL Paket (Faster Delivery)	Over €250.00	Free	3-7 Business Days

2.3 United States

Region	Shipping Method	Order Value	Cost	Est. Delivery
Continental U.S. (50 States)	USPS Ground Advantage	€0 - €45.00	€5.95	3-7 Business Days
	USPS Ground Advantage	Over €45.00	Free	3-7 Business Days
	USPS Priority Mail	€0 - €45.00	€16.95	1-4 Business Days
	USPS Priority Mail	Over €45.00	€14.95	1-4 Business Days
Non-Continental U.S. (AK, HI, PR, etc.)	USPS Ground Advantage	€0 - €60.00	€6.95	5-9 Business Days
Non-Continental U.S. (AK, HI, PR, etc.)	USPS Ground Advantage	Over €60.00	Free	5-9 Business Days

* The regions in the Non-Continental U.S. include: Alaska, American Samoa, Guam, Hawaii, the Marshall Islands, the Northern Mariana Islands, Palau, Puerto Rico, the U.S. Virgin Islands, and all U.S. Armed Forces addresses. The shipping and delivery to these areas are subject to the Non-Continental U.S. shipping rules.

2.4 International (Outside EU)

For specific international destinations, including Switzerland, United Kingdom, and Norway.

Order Amount	Shipping Cost
€0 - €300.00	€19.95
Over €300.00	Free

Important Notice:

Inventory Status: Please check the inventory status on the product page. Our system displays real-time stock for our Munich and Long Beach warehouses. If an item is out of stock in these locations, it will be marked as "Pre-order". You can still place an order for these items.
Pre-order Fulfillment: For "Pre-order" items, we arrange the most efficient logistics solution to ensure you receive your goods as quickly as possible. Your package may be shipped directly from our Shenzhen warehouse. Alternatively, as part of our standard restocking process, we may transport the goods to our Munich or Long Beach warehouse first (typically taking 5-10 business days) before dispatching them to you.
Split Shipments: If your order contains both in-stock and Pre-order items, we will prioritize shipping the in-stock items from the local warehouse immediately. The remaining Pre-order items will be sent to you in a separate shipment once they are ready.

3. International Warehouse

Our products are stored in our Munich, Long Beach, and Shenzhen warehouses to provide more flexible logistics solutions tailored to different regions and customer needs. On each product's description page, we indicate the specific warehouse location to help you better plan your purchase and delivery schedule.

3.1 German Warehouse

For products stored in our warehouse in Munich, we use either Deutsche Post or DHL for shipping, depending on the size of the package. Logistics within Germany are very efficient, with an estimated delivery time of 2-4 business days, ensuring you receive your order quickly and conveniently. For Western EU countries, the estimated delivery time is 4-6 business days. For Eastern EU countries, the estimated delivery time is 6-8 business days.

3.2 US Warehouse

For products stored in our warehouse in Long Beach, we use either USPS or UPS for shipping, depending on the size of the package. Logistics within U.S. are very efficient, with an estimated delivery time of 3-7 business days, ensuring you receive your order quickly and conveniently.

3.3 Chinese Warehouse

For Pre-order items or orders fulfilled directly from our Shenzhen warehouse, we utilize YunExpress for reliable international shipping. Given the complexities of international shipping, the estimated delivery time for these packages is around 10 business days, though this may vary slightly due to customs processes or other uncontrollable factors. Otherwise, products will be restocked to our Munich or US warehouses before final delivery, as detailed in the "Important Notice" above.

4. Customs and Taxes

4.1 How are customs handled by OpenELAB for import or export?

For EU Member States: Whether shipped from Germany or China, we cover all import duties and taxes (DDP), ensuring that you receive your package without any additional costs or hassle with customs.

Important Exception for Non-EU Countries (e.g., Switzerland, Norway):
For countries outside of the European Union, such as Switzerland and Norway, you may be subject to import duties, taxes, and/or customs fees charged upon delivery. These fees vary from country to country and are the sole responsibility of the recipient.

⚠️ Refusal of Delivery: If you refuse to pay these fees upon delivery and the package is returned to us, the refund amount will be calculated after deducting the original shipping costs, return shipping costs, and any applicable customs or storage fees.

4.2 How is VAT charged when the Customer places an order from OpenELAB?

In accordance with the newest VAT e-commerce rules in the EU, OpenELAB shall have the right to charge the amount of VAT at checkout. The standard rate of actual VAT applied is subject to the destination country's regulations. No additional VAT will be charged upon delivery for these orders.

M5Stack M5Stamp C3U Mate with Pin Headers

M5Stack M5Stamp C3U Mate with Pin Headers

Key Features:

Product Features

Include

Application

Program Download/Notes

product comparison

Specifications

1. General Shipping Information