SNMPv3 Integration on STM32H723

₹1500-12500 INR

In Progress

Posted 7 days ago

₹1500-12500 INR

Paid on delivery

I already have basic SNMP v1 “get” and “trap” working on an STM32H723-based board, but now the device must speak full SNMP v3 with security enabled. On the application layer I need you to add: • Authentication: SHA (usmHMACSHAAuthProtocol) • Privacy/Encryption: AES-128 (usmAesCfb128PrivProtocol) • Message handling: both Trap and Get operations exactly as they work today in v1, only now wrapped in v3 security headers The middleware, BSP, FreeRTOS tasks and UDP stack are in place; your task is to extend the existing agent code (currently using lwIP’s raw API) so that the MCU can: 1. Build and send authenticated, encrypted traps to our NMS. 2. Respond to encrypted, authenticated Get (and ideally GetNext) requests. 3. Expose a simple hook where I can register additional OIDs. Acceptance criteria • Wireshark capture shows v3 packets with authPriv, SHA + AES-128, and a valid engine ID. • Net-SNMP snmpget/snmptrapd can communicate successfully using the provided user/keys. • Code builds in STM32CubeIDE and fits within current Flash/RAM limits. Timing is critical, so I am looking for someone who has already implemented SNMP v3 on embedded targets (preferably STM32 + lwIP) and can dive straight into the codebase. We will work through a shared Git repository; please be ready to start immediately.

Project ID: 40706366

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Active 6 days ago

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Awarded to:

@Zainrais0786

With Previous experience in working SNMP protocol, I can assist you in integrating SNMP v3 "get" and "Traps" on STM32H723 and make it work with stm32 lwIP stack. Hi, I am Zain. My expertise includes • Embedded Systems • Firmware Development • C / C++ • STM32 F series / H series • SNMP v1, v2 and v3 • Circuit Design • PCB Design • KiCAD / Altium etc. Want to start early? Lets chat for further discussion Best regards

₹5,500 INR in 7 days

5.0

(13 reviews)

3.8

4 freelancers are bidding on average ₹10,625 INR for this job

@hexabitzprojects

Hi, This project is a strong match for my **16 years of embedded firmware experience** with STM32, FreeRTOS, lwIP, UDP/IP networking and industrial communication protocols. I have completed STM32-based networked/IoT systems where reliable non-blocking communication and resource constraints were critical. I can extend your existing **SNMP v1 agent to SNMP v3 authPriv** while preserving the current Trap/Get behavior and integrating cleanly with your STM32H723 + lwIP raw API architecture. I will implement: * **USM authentication with HMAC-SHA** * **AES-128 CFB privacy/encryption** * Engine ID and engine boots/time handling * SNMPv3 message/security parameter encoding and parsing * Authenticated + encrypted Trap transmission * Authenticated + encrypted Get/GetNext responses * Clean OID registration/application hooks * Robust error and malformed-packet handling I will validate interoperability using **Wireshark and Net-SNMP snmpget/snmptrapd**, including engine ID, authPriv fields and configured credentials, then optimize Flash/RAM usage for the existing STM32H723 target. I’m comfortable working directly in your shared Git repository and can start immediately. I will first review the existing v1 implementation and preserve its proven application behavior while adding the v3 security layer. Best regards, **Subhash Suman** STM32 | FreeRTOS | lwIP | SNMP | Embedded Networking **16 Years R&D Experience**

₹25,000 INR in 7 days

5.0

(1 review)

2.3

@morne01

?IF YOU'RE NOT HAPPY, YOU DON'T PAY.? I recently helped a client enhance their embedded system with secure communication protocols, improving their data handling significantly. I can help you implement full SNMP v3 support with security features while maintaining the existing functionality for your STM32H723-based board. I understand you need a clean, professional approach to build and send authenticated, encrypted traps, along with handling Get requests seamlessly. I specialize in embedded systems, particularly with STM32 and lwIP. I have extensive experience outside of freelancer, but I am new to Freelancer. I am ready to dive into the codebase and start working immediately. Regards, MORNE.

₹5,000 INR in 14 days