# Heltec CubeCell 1/2AA Node (HTCC-AB02A) > Ultra-low-power LoRa/LoRaWAN development node based on the ASR6502 SoC (ARM Cortex-M0+ @ 48MHz + SX1262), with a built-in 1/2AA battery holder, 3.5uA deep sleep, and Arduino compatibility. Ideal for remote sensor deployments. ## Quick Facts - **Brand:** Heltec - **Price:** ~$12.9 - **CPU:** ARM Cortex-M0,single-core @ 48MHz (PSoC 4000 series) - **CPU Architecture:** ARM Cortex-M0+ - **CPU Cores:** 1 - **RAM:** 16KB SRAM - **Flash:** 128KB - **USB:** Micro-USB (CP2102) - **Power:** Micro-USB 5V / 1/2AA 3.6V lithium battery - **Operating Voltage:** 3.3V - **Operating Temp:** -20°C to +70°C - **Dimensions:** 56.6 × 24 × 21.5mm - **Weight:** 40g - **Antenna:** SMA female (LoRa) - **SD Card:** No ## Connectivity - **Lora:** SX1262 433/868/915MHz ## Certifications CE, FCC ## Use Cases - lorawan-sensor-node - environmental-monitoring - smart-agriculture - asset-tracking - battery-powered-sensor-node - field-data-logger ## Components - **ASR6502** (mcu): PSoC 4000 series ARM Cortex-M0+ running at 48MHz with 128KB flash and 16KB SRAM, integrating the SX1262 LoRa transceiver for a single-chip LoRaWAN solution. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02A%2FAB02A.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export) - **SX1262** (radio): Semtech SX1262 long-range, low-power sub-GHz RF transceiver supporting LoRa and (G)FSK modulation across 150-960MHz bands, with +22dBm output power and -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-ab02a&source=md-export) - **CP2102** (usb-serial): Silicon Labs CP2102 USB-to-UART bridge providing serial communication over Micro-USB for programming and debugging. — [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-ab02a&source=md-export) ## Protocols - **UART** (UART1): TX: GPIO5 (P3_1), RX: GPIO5 (P3_0) - **UART** (UART2): TX: GPIO (P4_5), RX: GPIO (P4_4) - **SPI** (SPI0): SCK: P4_2, MOSI: P4_0, MISO: P4_1, SS: P4_3 - **SPI** (SPI1): SCK: GPIO3 (P6_2), MOSI: GPIO1 (P6_0), MISO: GPIO2 (P6_1) - **I2C** (I2C0): SDA: P0_1, SCL: P0_0 - **I2C** (I2C1): SDA: GPIO9 (P7_1), SCL: GPIO8 (P7_0) - **SWD**: SWDIO: SWDIO, SWCLK: SWCLK ## GPIO Map | Pin | Name | Type | Functions | |-----|------|------|-----------| | GPIO1 | SPI1 MOSI / Digital I/O | SPI | digital-input, digital-output | | GPIO2 | SPI1 MISO / Digital I/O | SPI | digital-input, digital-output | | GPIO3 | SPI1 CLK / PWM1 | SPI | digital-input, digital-output, pwm | | GPIO4 | PWM2 / Digital I/O | — | digital-input, digital-output, pwm | | GPIO5 | Vext Control (P3_4) | — | digital-input, digital-output | | GPIO6 | Digital I/O (P3_6) | — | digital-input, digital-output | | GPIO7 | Digital I/O (P3_7) | — | digital-input, digital-output | | GPIO8 | I2C1 SCL | I2C | digital-input, digital-output | | GPIO9 | I2C1 SDA | I2C | digital-input, digital-output | | GPIO10 | Digital I/O (P7_2) | — | digital-input, digital-output | | GPIO11 | Digital I/O (P0_2) | — | digital-input, digital-output | | GPIO12 | Digital I/O (P0_3) | — | digital-input, digital-output | | GPIO13 | LED / Digital I/O (P0_6) | — | digital-input, digital-output | | GPIO14 | Digital I/O (P0_7) | — | digital-input, digital-output | | ADC1 | 12-bit Analog Input (P2_0) | ADC | adc, digital-input | | ADC2 | 12-bit Analog Input (P2_1) | ADC | adc, digital-input | ## Description ## Overview The Heltec CubeCell 1/2AA Node (HTCC-AB02A) is a compact LoRa/LoRaWAN development board designed for ultra-low-power remote sensor node deployments. Built around the ASR6502 system-on-chip — which integrates an ARM Cortex-M0+ processor running at 48MHz with a Semtech SX1262 LoRa transceiver — it achieves a remarkably low 3.5 microamp deep sleep current, making it well-suited for years-long battery-powered operation on a single 1/2AA lithium cell. The board comes with a built-in 1/2AA battery holder, SMA antenna connector, and integrated CP2102 USB-to-serial bridge for programming and debugging via Micro-USB. It supports LoRaWAN 1.0.2 protocol across multiple frequency bands (433MHz, 470-510MHz, 863-870MHz, 902-928MHz) and delivers up to +22dBm transmit power with -135dBm receive sensitivity, enabling long-range communication in diverse deployment environments. Development is straightforward thanks to full Arduino IDE and PlatformIO compatibility through the CubeCell-Arduino framework. The board exposes 16 GPIO pins including 3 ADC channels (12-bit), 2 PWM outputs, dual SPI and I2C buses, and dual UARTs, providing enough peripheral access for common sensor integration tasks. CE and FCC certifications make it ready for both prototyping and field deployments in regulated regions. The HTCC-AB02A is particularly well-suited for environmental monitoring, smart agriculture, asset tracking, and any application requiring long battery life with periodic LoRaWAN transmissions from remote locations. ## Where to Buy - [Heltec Official](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-ab02a%2F&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export) — 12.90 - [Amazon](https://openhardware.directory/r?to=https%3A%2F%2Fwww.amazon.com%2FHeltec-HTCC-AB02A-Applications-Development-902-928MHz%2Fdp%2FB0D2LD7ZTX&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export) — 12.90 ## Resources - [product](https://openhardware.directory/r?to=https%3A%2F%2Fheltec.org%2Fproject%2Fhtcc-ab02a%2F&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export) - [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FHelTecAutomation%2FCubeCell-Arduino&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export) - [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fwiki.heltec.org%2Fdocs%2Fdevices%2Fopen-source-hardware%2Fcubecell-series%2Fhtcc_ab02a%2F&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export) - [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02A%2FAB02A.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export) - [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fresource.heltec.cn%2Fdownload%2FCubeCell%2FHTCC-AB02A%2FHTCC-AB02A_SchematicDiagram.pdf&ref=openhardware.directory&product=heltec-cubecell-htcc-ab02a&source=md-export) ## Tags `lora`, `lorawan`, `iot`, `low-power`, `sensor-node`, `asr6502`, `sx1262`, `heltec`, `cubecell`, `arduino` ## Images ![Heltec CubeCell 1/2AA Node (HTCC-AB02A)](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-cubecell-htcc-ab02a/31d23bef785f.png) ![Heltec CubeCell 1/2AA Node (HTCC-AB02A)](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-cubecell-htcc-ab02a/2f03be5fb526.jpg) ![Heltec CubeCell 1/2AA Node (HTCC-AB02A)](https://nbg1.your-objectstorage.com/openhardware-directory/entities/heltec-cubecell-htcc-ab02a/df9353139312.jpg) > **Battery Powered:** 1/2AA Lithium (non-rechargeable) --- [View full device page](https://openhardware.directory/devices/heltec-cubecell-htcc-ab02a)