# CubeCell Dev-Board Plus (HTCC-AB02) > Heltec CubeCell HTCC-AB02 is an ultra-low-power LoRa/LoRaWAN development board based on the ASR6502 SoC (ARM Cortex-M0+ with integrated SX1262), featuring a 0.96" OLED display, solar panel input, and lithium battery management. Ideal for long-range IoT sensor nodes and agricultural monitoring. ## Quick Facts - **Brand:** Heltec Automation - **Price:** ~$15.5 - **Product Readiness:** production-ready - **CPU:** ARM Cortex-M0,single-core @ 48MHz - **CPU Architecture:** ARM Cortex-M0+ - **CPU Cores:** 1 - **RAM:** 16KB SRAM - **Flash:** 128KB - **USB:** Micro-USB (CP2102) - **Power:** 5V Micro-USB,3.7V LiPo,5.5-7V Solar - **Operating Voltage:** 3.3V - **Operating Temp:** -20°C to +70°C - **Dimensions:** 51.9 × 25 × 8mm - **Weight:** 30g - **Battery:** User-supplied 3.7V LiPo (SH1.25 connector) - **Antenna:** IPEX (U.FL) - **SD Card:** No - **Display:** 0.96" OLED 128x64 ## Connectivity - **Lora:** SX1262 433/868/915MHz ## Certifications CE, FCC ## Use Cases - lorawan-node - lorawan-sensor-node - battery-powered-sensor-node - solar-powered-sensor - weather-station - soil-monitoring - compost-monitor - remote-sensor-nodes ## Components - **ASR6502** (mcu): 48MHz ARM Cortex-M0+ MCU (PSoC 4000 series) with integrated SX1262 LoRa transceiver, 128KB flash, 16KB SRAM, 8-channel DMA, and ultra-low-power design with 3.5uA deep sleep. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02%2FAB02.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) - **SX1262** (radio): Semtech SX1262 long-range, low-power sub-GHz RF transceiver supporting LoRa and (G)FSK modulation, 150-960MHz ISM bands, +22dBm TX power, -135dBm receive sensitivity. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn.sparkfun.com%2Fassets%2F6%2Fb%2F5%2F1%2F4%2FSX1262_datasheet.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) - **SSD1306** (display-driver): Solomon Systech SSD1306 OLED driver IC controlling the built-in 0.96-inch 128x64 monochrome OLED display, connected via I2C (SDA0/SCL0). Used for debugging info, battery status, and sensor readout. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FSSD1306.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) - **CP2102** (usb-uart): Silicon Labs CP2102 single-chip USB-to-UART bridge providing serial programming and debug interface via Micro-USB connector. Royalty-free VCP drivers available for Windows, Mac, and Linux. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.silabs.com%2Fdocuments%2Fpublic%2Fdata-sheets%2FCP2102-9.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) - **Solar Input** (battery-charger): Integrated lithium battery management system with charge/discharge control, overcharge protection, battery voltage detection (VBAT_ADC), and automatic USB/battery/solar power switching. Supports 5.5-7V solar panel input. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02%2FHTCC-AB02_SchematicDiagram.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) ## Protocols - **I2C** (I2C0): SDA: GPIO (Pin 40 / SDA0), SCL: GPIO (Pin 39 / SCL0) - **I2C** (I2C1): SDA: GPIO9 (Pin 37 / SDA1), SCL: GPIO8 (Pin 36 / SCL1) - **SPI** (SPI0): MISO: Pin 26 / MISO0, MOSI: Pin 25 / MOSI0, CLK: Pin 27 / CLK0, NSS: Pin 28 / NSS0 - **SPI** (SPI1): MISO: GPIO2 (Pin 9 / MISO1), MOSI: GPIO1 (Pin 8 / MOSI1), CLK: GPIO3 (Pin 10 / CLK1), NSS: Any GPIO - **UART** (UART1): TX: Pin 18 / TX1, RX: Pin 17 / RX1 - **UART** (UART2): TX: Pin 30 / TX2, RX: Pin 29 / RX2 - **SWD**: SWDIO: SWD data, SWCLK: SWD clock - **LoRa**: MISO: Pin 26, MOSI: Pin 25, CLK: Pin 27, NSS: Pin 28 ## GPIO Map | Pin | Name | Type | Functions | |-----|------|------|-----------| | GPIO1 | MOSI1 — SPI1 Master Out | SPI | digital-input, digital-output | | GPIO2 | MISO1 — SPI1 Master In | SPI | digital-input, digital-output | | GPIO3 | CLK1 / PWM1 — SPI1 Clock / PWM Output | SPI | digital-input, digital-output, pwm | | GPIO4 | PWM2 — PWM Output | PWM | digital-input, digital-output, pwm | | GPIO5 | General Purpose I/O | — | digital-input, digital-output | | GPIO6 | General Purpose I/O | — | digital-input, digital-output | | GPIO7 | General Purpose I/O | — | digital-input, digital-output | | GPIO8 | SCL1 — I2C1 Clock | I2C | digital-input, digital-output | | GPIO9 | SDA1 — I2C1 Data | I2C | digital-input, digital-output | | GPIO10 | OLED Reset | — | digital-input, digital-output | | GPIO11 | General Purpose I/O | — | digital-input, digital-output | | GPIO12 | General Purpose I/O | — | digital-input, digital-output | | GPIO13 | RGB LED Output | — | digital-input, digital-output | | GPIO14 | General Purpose I/O | — | digital-input, digital-output | | GPIO15 | Vext Control — External 3.3V Power Switch | — | digital-output | | GPIO16 | VBAT_ADC Control / USER Button | — | digital-input, digital-output | | ADC1 | 12-bit Analog Input / Power Detection | ADC | adc, digital-input | | ADC2 | 12-bit Analog Input | ADC | adc, digital-input | | ADC3 | 12-bit Analog Input | ADC | adc, digital-input | ## Accessories - external-antenna ## Description ## Overview The Heltec CubeCell Dev-Board Plus (HTCC-AB02) is a compact LoRa/LoRaWAN development board built around the ASR6502 system-on-chip, which integrates an ARM Cortex-M0+ processor running at 48MHz with a Semtech SX1262 LoRa transceiver on a single die. This tight integration yields exceptional power efficiency, with deep sleep current as low as 3.5 microamps — making it one of the most power-efficient LoRa development boards available. The board ships with a 0.96-inch OLED display (SSD1306, 128x64 pixels) for on-device debugging and status readout, and includes a built-in lithium battery management system with charge/discharge control, overcharge protection, and automatic USB/battery power switching. A dedicated solar panel input (5.5-7V) enables fully autonomous deployments in remote locations without access to mains power. With 16 GPIO pins, three 12-bit ADC channels, dual UART/SPI/I2C interfaces, and full Arduino compatibility via the CubeCell-Arduino framework, the HTCC-AB02 serves as a versatile platform for building LoRaWAN sensor nodes, agricultural monitors, environmental data loggers, and other long-range IoT applications. The board supports LoRaWAN 1.0.2 protocol and operates across 433/868/915MHz frequency bands, covering global LoRaWAN deployments on networks like The Things Network and Helium. Community projects demonstrate real-world use cases including solar-powered compost heap temperature monitoring, soil moisture sensing for smart irrigation, and LoRa APRS tracking — all leveraging the board's ultra-low power consumption and long-range communication capabilities. ## Where to Buy - [Heltec Official Store](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-ab02%2F&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) — 15.50 - [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-Development-HTCC-AB02-Compatible-902-928MHz%2Fdp%2FB0D4MBYV63&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) — 24.99 - [Parley Labs](https://openhardware.directory/r?to=https%3A%2F%2Fparleylabs.com%2Fcubecell-dev-board-plus-htcc-ab02-us915%2F&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) — 25.94 ## Resources - [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-ab02%2F&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) - [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FCubeCell-Arduino&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) - [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.heltec.org%2Fen%2Fnode%2Fasr650x%2Fhtcc_ab02%2Findex.html&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) - [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02%2FAB02.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) - [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02%2FHTCC-AB02_SchematicDiagram.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02&source=md-export) ## Tags `lora`, `lorawan`, `iot`, `cubecell`, `asr6502`, `sx1262`, `heltec`, `solar`, `oled`, `low-power` ## Images ![CubeCell Dev-Board Plus (HTCC-AB02)](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-cubecell-htcc-ab02/71659a00a3be.png) ![CubeCell Dev-Board Plus (HTCC-AB02)](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-cubecell-htcc-ab02/fb6431f7b356.png) ![CubeCell Dev-Board Plus (HTCC-AB02)](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-cubecell-htcc-ab02/1b868e50f7e2.jpg) ![CubeCell Dev-Board Plus (HTCC-AB02)](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-cubecell-htcc-ab02/79a29dc9d0fc.png) > **Battery Powered:** yes --- [View full device page](https://openhardware.directory/devices/heltec-cubecell-htcc-ab02)