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MCU | ESP32 |
Chip | SX1276/SX1278 |
Type | LoRa Dev-Board |




source | parameter |
MCU | ESP32( 240MHz Tensilica LX6 dual-core + 1 ULP, 600 DMIPS, 520KB SRAM, Wi-Fi, dual mode Bluetooth) |
LoRa chip | SX1276 (868 and 915 version); SX1278 (433 and 470 version) |
LoRa bands | EU_433, CN_470_510, EU_863_870, US_902_928 four bands optional |
LoRa maximum output power | 18dB ± 2dB |
Hardware resources | UART x 3; SPI x 2; I2C x 2; I2S x 1 |
12 – bits ADC; 8 – bits DAC | |
29 general GPIO | |
Display | 0.96 inch 128*64 OLED display |
FLASH | 8MB(64M-bits) SPI FLASH |
interface | Micro USB x 1; LoRa antenna interface(IPEX) x 1 |
Size | 50.2 x 25.5 x 9.74 mm |
USB to UART Bridge | CP2102 |
Battery Type | 3.7V Lithium(SH1.25 x 2) |
Battery detection circuit | √ |
External device power control(Vext) | √ |
Low power design | Deep Sleep 800uA |
Electrical characteristics | condition | Minimum | Typical | Maximum |
Power Supply | USB powered(≥500mA) | 4.7V | 5V | 6V |
Lithium powered(≥250mA) | 3.3V | 3.7V | 4.2V | |
3.3V(pin)powered(≥150mA) | 2.7V | 3.3V | 3.5V | |
5V(pin)powered(≥500mA) | 4.7V | 5V | 6V | |
Power consumption(mA) | WIFI scan | 115mA | ||
WIFI AP | 135mA | |||
LoRa 10dB emission | 50mA | |||
LoRa 12dB emission | 60mA | |||
LoRa 15dB emission | 110mA | |||
LoRa 20dB emission | 130mA | |||
Output | 3.3V pin output | 500mA | ||
5V pin output (USB powered only) | Equal to the input current | |||
External device power control (Vext 3.3V) | 350mA |



》CE Certificate; | ||||||||
》Microprocessor: ESP32 (dual-core 32-bit MCU + ULP core), with LoRa node chip SX1276/SX1278; | ||||||||
》Micro USB interface with a complete voltage regulator, ESD protection, short circuit protection, RF shielding, and other protection measures; | ||||||||
》Onboard SH1.25-2 battery interface, integrated lithium battery management system (charge and discharge management, overcharge protection, battery power detection, USB / battery power automatic switching); | ||||||||
》Integrated WiFi, LoRa, Bluetooth three network connections, onboard Wi-Fi, Bluetooth dedicated 2.4GHz metal 3D antenna, reserved IPEX (U.FL) interface for LoRa use; | ||||||||
》Onboard 0.96-inch 128*64 dot matrix OLED display, which can be used to display debugging information, battery power, and other information; | ||||||||
》Integrated CP2102 USB to serial port chip, convenient for program downloading, debugging information printing; | ||||||||
》Support the Arduino development environment; | ||||||||
》We provide ESP32 + LoRaWAN protocol Arduino® library, this is a standard LoRaWAN protocol that can communicate with any LoRa gateway running the LoRaWAN protocol. In order to make this code running, a unique license is needed. it can be found on this page; | ||||||||
》With good RF circuit design and basic low-power design (sleep current ≤800uA), it is convenient for IoT application vendors to quickly verify solutions and deploy applications. | ||||||||




Chengdu Heltec Automation Technology Co., Ltd. ( English abbreviation Heltec Automation). At present, The company's research and development and production include OLED dot matrix screen, electronic ink screen, IoT series products, LoRa supporting solutions and high-precision temperature controllers with automatic control algorithms as the core.
At present, there is a strong technical research and development team, a scientific production and manufacturing platform and a quality management system with strict quality and quality.
1 | Rigorous quality assurance system |
2 | High level of service awareness |
3 | High quality team |
4 | Components use well-known brands |
5 | Quick response customer program |
6 | Self-owned processing plant, rapid production,equipped with automatic SMT placement machine, automatic screen printing machine and reflow oven |
Development Team | 6 Years |
Sales | 5 Years |
Production | 3 Years |
Supporting Plan | 3 Years |
International Market | 2 Years |

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