Firmware development - PCB UNIT


We has recently developed a new electronic PCB control interface based on existing PCB product but adding some new features. The purpose of this document is to define the requirements for a new firmware development.


PCB is an embedded hardware design based on PIC24 microcontroller.

This are the main elements involved in this firmware upgrade:

• PIC24FJ128GA308 microcontroller

• S25FL064L 64Mbit SPI Flash memory

• Two RS-485 serial communication channels MODBUS-RTU


New features to be added:

• Bootloader that allows FW of PCB to be upgraded from a TFT Control Unit by RS-485 communication.

• Communication drivers for fast and efficient interface communication (up to 115200 bauds).


We will supply hardware units of PCB and all necessary tools for developing the new firmware.

4.1) Modify bootloader fw of TFT Control Unit to allow to upgrade remotely till 32 PCB units. Also is necessary to add an option to “clean” SPI configuration and left default values (no PCB units detected).

4.2) Bootloader that allows FW of PCB to be upgraded from a TFT Control Unit by RS-485 communication. TFT Control unit should read the new firmware files in USB pendrive: is very important the correct identification of remote units and it’s corresponding binary file. 32 units can be connected to the Modbus network.

4.3) Modify Communication drivers of PCB units for fast and efficient interface communication.

Taidot: Firmware, elektroniikka, C-ohjelmointi, Sulautetut ohjelmistot

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Tietoa työnantajasta:
( 12 arvostelua ) Castellar del Vallès, Spain

Projektin tunnus: #21324633

Myönnetty käyttäjälle:


Thank you Santi for posting the project we discussed. I am going to bid for the amount we agreed. Also I am changing the order of the milestones, so we fix the communication issues first, as we agreed

€3750 EUR 45 päivässä
(19 Arvostelua)

36 freelanceria on tarjonnut keskimäärin 3773€ tähän työhön


Hi, I'm an electrical engineer with 8 years of experience in firmware programming. My firmware experience involves various MCU such as Atemga, STM, Nordic BLE chips, ESP32, RPi, PSOC, .. My former products are mainly w Lisää

€4000 EUR 29 päivässä
(20 arvostelua)

Hello! We have vast experience in programming various microcontrollers, including PIC microcontrollers. We made various systems: control systems (for controlling equipment at gas production), measurement systems (for t Lisää

€3000 EUR 30 päivässä
(17 arvostelua)

Dear Sir. How do you do? I have seen your description very carefully and posting to you my idea. you can see my many work history from my profile. If you give me a chance to interview, I'll explain in more detail and Lisää

€4000 EUR 7 päivässä
(33 arvostelua)

Dear Your post stood out to me because it is extremely similar to the work I’ve provided for many of my other clients. I am a senior iOS/Android developer with 7+ years experience. I have good hands on Swift/Kotlin/ Lisää

€4000 EUR 7 päivässä
(86 arvostelua)

Hi Sir, WE have read all your points, we are best fit for this job as we are professional PCB designers, embedded firmware designers and IOT specialists. Lets talk to us on your project. We are professional engineers Lisää

€4300 EUR 26 päivässä
(34 arvostelua)

hello i have reviewed your project description , and i can help you to achieve the requested tasks. i have a long experience in embeeded systems and microchip controllers. we can discuss more details in private chat Lisää

€3596 EUR 30 päivässä
(49 arvostelua)

Experienced with pic mcu and have done lots of similar projects. Please contact me if interested. Hash

€3888 EUR 20 päivässä
(9 arvostelua)

⭐⭐⭐Dear client⭐⭐⭐ Nice to meet you. Low cost, high quality. already we have rich experiences with PIC series. I am very very familiar with your job posting. we're an expert team with MCU such as RK, stm, PIC. I can sta Lisää

€3333 EUR 7 päivässä
(10 arvostelua)

Hi. I am very interested in your project. i have rich experience on PCB design and firmware programming. I think this project is very suitable for me and i am sure i can give you good result . If you award me for your Lisää

€3000 EUR 7 päivässä
(7 arvostelua)

Hello, Sir. I read carefully about your project. The firmware upgrading by itself from the TFT sd card is possible for me. I can make the bootloader of firmware upgrading .Also fast communication of the RS-485 seria Lisää

€3500 EUR 7 päivässä
(5 arvostelua)

Hi,dear client. Thanks for taking your valuable time for reviewing my proposal. I am very interested in your project - 'Firmware development - CLEVER PCB'. Because I have been familiar with similar projects. Perhaps yo Lisää

€4444 EUR 23 päivässä
(1 arvostelu)

Hi, I am embedded system engineer and have working experience with PIC family, RS485 protocol and bootloaders. I have some queries related to your project if you consider to hire me please ping me back so that we can Lisää

€4000 EUR 50 päivässä
(4 arvostelua)

Hi I have done pic24f based queue management system and RS 485 We can discuss Below is my linkedin profile [login to view URL] Regards Senthil Relevant Skills a Lisää

€3000 EUR 60 päivässä
(7 arvostelua)

Hola I am interested in your project. I am an embedded system engineer with hands-on experience with PCB Design and embedded software. I also have experince with Microchip MCUs like PIC series and bootloader. I can Lisää

€3000 EUR 14 päivässä
(6 arvostelua)

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€3000 EUR 7 päivässä
(1 arvostelu)

Dear Sir. How do you do? I have seen your description very carefully and posting to you my idea. If you give me a chance to interview, I'll explain in more detail and I'll do my best for you. I will work hard and hard Lisää

€4000 EUR 34 päivässä
(6 arvostelua)

Dear client. I'm finest. Thank for reading my bid. I have just read your requirement at carefully. I 'm a full stack and full time developer. Especially, I like Java, C, C++ and C# languages because these are my hobby Lisää

€4000 EUR 7 päivässä
(4 arvostelua)

Hello. I have rich experience with design, simulation and analysis using Altium Designer, Proteus, and arduinoIDE. i use Altium Designer 2017 version and have all component libraries for altium now. i can make schemati Lisää

€3000 EUR 7 päivässä
(2 arvostelua)

Hi. I’m developing electrical devices , embedded software and service programming. I have designed several devices and have a lot of experience with PIC,AVR microcontroller, ARM processors, Raspberry Pi, and Arduino du Lisää

€4000 EUR 7 päivässä
(5 arvostelua)

Hi, I read your project description. Your project is really interesting to me and i have many experience working with PCB design, manufacturing functional prototyping with firmware programming, adroid app, and test. I' Lisää

€4000 EUR 25 päivässä
(1 arvostelu)