OTA Firmware Updates Firmware Guide

Firmware Features

Over-the-air firmware update mechanisms for deployed IoT devices. Critical for security patches, feature updates, and regulatory compliance in the field.

Key Topics

MCUboot bootloader
Dual-bank (A/B) updates
Image signing and verification
Delta/incremental updates
Rollback protection
DFU over BLE/cellular

Supported Hardware

nRF52840

Advanced multiprotocol SoC with 1MB Flash, 256KB RAM, and USB support. The go-to chip for Bluetooth 5.4, Thread, Zigbee, and 802.15.4 applications.

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nRF5340

Dual-core Bluetooth 5.4 SoC with dedicated application and network processors. 1MB Flash + 512KB RAM on the application core, with hardware security via ARM TrustZone.

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nRF9160

Cellular IoT SiP with integrated LTE-M/NB-IoT modem and GPS. Perfect for asset tracking, remote monitoring, and any application requiring wide-area connectivity.

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ESP32

Dual-core Wi-Fi and Bluetooth combo chip with extensive peripheral support. One of the most popular IoT microcontrollers for prototyping and production.

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ESP32-S3

AI-capable dual-core MCU with vector instructions for neural network acceleration, Wi-Fi, and BLE 5.0. Ideal for AIoT edge computing applications.

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STM32F4

High-performance ARM Cortex-M4 series with DSP and FPU. Industry workhorse for motor control, industrial automation, and signal processing applications.

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STM32H7

Highest-performance STM32 series with ARM Cortex-M7 running at 480 MHz. Ideal for graphics, AI inference, and complex signal processing at the edge.

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nRF52805

Ultra-compact, cost-optimized BLE 5.4 SoC with 192KB Flash and 24KB RAM. The smallest, most affordable chip in the nRF52 series for simple BLE applications.

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nRF52810

Cost-optimized BLE 5.4 SoC with 192KB Flash and 24KB RAM, featuring hardware SWI and NFC-A tag. Ideal for high-volume BLE peripherals and beacons.

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nRF52811

BLE 5.4 SoC with optional 802.15.4 and ANT support plus long-range mode (Coded PHY). Extends nRF52810 with Thread and extended-range BLE capability.

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nRF52820

BLE 5.4 and 802.15.4 SoC with USB 2.0 Full Speed and 256KB Flash. Bridges BLE/Thread wireless with USB at lower cost than the nRF52840.

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nRF52833

Full-featured BLE 5.4 + 802.15.4 SoC with 512KB Flash, 128KB RAM, USB, and NFC. Offers extended-range BLE (Coded PHY) and mid-range capability between nRF52832 and nRF52840.

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nRF54H20

High-performance multicore SoC with dual Cortex-M33 (application + radio) plus a RISC-V VPR core. 2MB Flash and 1MB RAM, designed for complex multiprotocol BLE + 802.15.4 applications.

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nRF54L05

Entry-level nRF54L series SoC with ARM Cortex-M33 and RISC-V co-processor. Ultra-low-power BLE 5.4 with 512KB Flash — the most affordable chip in the nRF54L family.

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nRF54L10

Mid-range nRF54L series SoC combining ARM Cortex-M33 with a RISC-V co-processor. 1MB Flash and 128KB RAM with BLE 5.4, targeting wearables and connected sensors.

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nRF54LM20

The flagship nRF54L series SoC built on a 22nm process, featuring a 128 MHz ARM Cortex-M33 + RISC-V co-processor with 2MB Flash and 512KB RAM — the largest memory in the nRF54L family. Supports Bluetooth LE, Matter, Thread, Zigbee, and 2.4 GHz proprietary protocols up to 4 Mbps. The nRF54LM20A variant adds 66 GPIOs and high-speed USB; the nRF54LM20B adds an integrated Axon NPU for hardware-accelerated Edge AI inference. Security includes TrustZone, CRACEN cryptographic engine with side-channel protection, and tamper detection.

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nRF9131

Ultra-compact LTE-M/NB-IoT SiP (System-in-Package) with DECT NR+ support and GNSS. The smallest form-factor nRF91 series chip for space-constrained cellular IoT designs.

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nRF9151

LTE-M/NB-IoT SiP with integrated GNSS, DECT NR+, and extended temperature support. An improved nRF9160 successor with lower power consumption and industrial-grade temperature range.

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nRF9280

DECT NR+ and LTE-M/NB-IoT SiP designed for the unlicensed 1.9 GHz DECT band. Enables high-speed, low-latency local-area wireless for industrial automation and smart factory applications.

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More Firmware Features

Frequently Asked Questions

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