Rockchip's RV1126B is steadily picking up board support, and Graperain is the latest vendor to build around it with the GR1126B, a 42 x 42 mm (1.7 x 1.7 inches) stamp-hole system-on-module aimed at edge AI vision. The company ships images for both BuildRoot and Debian 12, which makes the module approachable for anyone who would rather develop against a familiar Linux userspace than a stripped-down embedded stack while a custom carrier board is still on the bench.
The SoC pairs a quad-core Arm Cortex-A53 running at up to 1.6 GHz with a 3 TOPS NPU that handles INT4, INT8, INT16, and FP16 models and accepts networks from TensorFlow, ONNX, PyTorch, and Caffe. On the imaging side there is a 12-megapixel ISP plus a separate 8-megapixel AI-ISP, H.265/H.264 decode at 4K30 and encode at 4K45, and enough MIPI bandwidth to take in up to five cameras at once through two 4-lane or four 2-lane CSI configurations. Memory starts at 1GB or 2GB of DDR3 and can be specced up to 4GB of LPDDR4/LPDDR4x, with eMMC options spanning 8GB to 256GB. The 160 castellated pins also expose Gigabit Ethernet, USB 3.0 DRD, two CAN buses, eight UARTs (seven with RS485), and an industrial -20°C to +80°C (-4°F to 176°F) operating range.
The NPU is where the open-source tooling angle matters. RV1126B is a supported target in Rockchip's RKNN-Toolkit2 and the accompanying RKNN Model Zoo, so model conversion, quantization, and on-device inference go through the same toolchain already used across the Rockchip NPU lineup. The RKNPU2 runtime provides the C/C++ and Python interfaces for deploying converted models. RV1126B is also an explicitly listed target in Ultralytics' RKNN export pipeline, which covers direct export and quantization of YOLO models to RKNN format for NPU inference without manual conversion steps. Graperain layers its own AI framework on top for object detection, face and license-plate recognition, industrial defect inspection, and similar edge analytics.
Graperain isn't first to the RV1126B module market. It joins the Forlinx FET1126BX-S and the smaller Boardcon Tiny1126B, each taking a different connector approach. For evaluation, the 120 x 90 mm (4.7 x 3.5 inches) GR1126MB carrier board breaks the module out to a microSD slot, MIPI LCD and dual CSI connectors, three USB 2.0 Type-A ports and a USB-C OTG port, a 40-pin GPIO header, onboard WiFi and Bluetooth, and an optional 4G LTE mini PCIe socket with a SIM slot.
Graperain has not published pricing, and the SDK, Linux BSP, and design guides are available on request rather than as public downloads; for now the only open documentation is a pair of short interface datasheets. Specifications are on the product page.
