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| Pin number | Pin name | Type | Function description |
| 1 | STATE | I/O | You can customize the firmware to develop the corresponding functions as needed. |
| 2 | RXD | I/O | GPIO3 |
| The module has a 22Ω current-limiting resistor in series and can be connected to an external 5.0V level. | |||
| Can be used as a UART Rx when programming Flash | |||
| 3 | TXD | I/O | GPIO1 |
| The module has a 22Ω current-limiting resistor in series and can be connected to an external 5.0V level. | |||
| Can be used as a UART Tx when programming Flash | |||
| 4 | GND | P | GND |
| 5 | VCC | P | Module power supply: 3.3V~5.0V, 5.0V is recommended |
| 6 | EN | I | Chip enable, active high, the chip works normally; low level: the chip is off, the current is very small |










Shipping | Delivery Period | For in-stock parts, orders are estimated to ship out in 3 days. Elecbee ships orders once a day at about 5pm except Sunday. Once shipped, estimated delivery time depends on the below carriers you chose. DHL Express: 3-7 business days DHLeCommerce: 12-22 business days FedEx International Priority: 3-7 business days EMS: 10-15 business days Registered Air Mail: 15-30 business days | |
| Shipping Rates | Shipping rates for your order can be found in the shopping cart. | ||
| Shipping Options | Shipping rates for your order can be found in the shopping cart. | ||
| Shipping Tracking | We will notify you by email with tracking number once order is shipped. You can track your order using the “Track My Order” feature. | ||
| Returning/Warranty | Returning | Returns are normally accepted when completed within 30 days from date of shipment, please contact customer service for a return authorization. Parts should be unused and in original packaging. Customer has to take charge for the shipping | |
| Warranty | All Elecbee purchases come with a 30-day money-back return policy, plus 1-year Elecbee warranty against any manufacturing defects. | ||
| This warranty shall not apply to any item where defects have been caused by improper customer assembly failure by customer to follow instructions, product modification, negligent or improper operation | |||
| Ordering | How to Buy | Elecbee accepts online orders. | |
| Add to cart > Check out > Submit order > Complete payment > Delivery | |||
| Payment | PayPal, Credit Card includes Visa, Master, American Express, Bank transfer. | ||