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Javier L.

@javierlongares

5.0
1
1.2
1.2
100%

Quality Hardware & Microcontroller Firmware Dev.

$75 USD / Hour
・
Flag of
Spain (10:55 PM)
・
Joined on March 10, 2015
$75 USD / Hour
・
??+ ????? ?? ???????????? ??????????? ??????????. ✅ ?-???? ???????? ?? ??? ???????? ??? ???????? ???????. ☑️ ???+ ???????? ???????????? ?????????. ? Hi! I’m Javier and I specialize in helping both startups and small to medium businesses with high-quality solutions to their electronics engineering challenges. To be even more specific I am expert on projects related to: ? Nordic Semiconductors: NRF52 ( NRF52832, NRF52833, NRF82840 ), NRF53 ( NRF5340 ), and NRF70 ( NRF7002 ). ? Espressif: ESP32-WROOM, Wrover Kit, LyraT, ESP32-S2, ESP32-S3, ESP32-C2, ESP32-C3, ESP32-C6, and ESP32-H2. ? Microchip: Arduino AVR, ATMEGA and ATSAM. PIC32MZ, PIC32MZ, PIC24, PIC16 and PIC18. ? Texas Instruments: TIVA Boards ( TM4C129, TM4C123) , MSP430, MPS432, CC3220, CC2430, CC2652, CC3200. ? ST STM32F4, STM32F7, STM32L0, STM32WB55, STM32WB15. ? Cypress: PSoC4, PSoC5 and PSoC6. ? NXP: Dual Core LPC55S69 and single core Kinetis Microcontrollers. ? Qorvo UWB modules: DW1000, DWM1001C, DWM3001C, and DW3110. (DW3000 devices are compatible with Apple Nearby Interaction protocol). Software: ? IDEs: IAR for Embedded Workbench, uVisio, Code Composser Studio, PSoC Creator, MPLABX, Eclipse, Atmel Studio, VS Code, STM32CubeIDE and STM32CubeMX ? Programming Languages: C, C++ ? PCB Software: Altium, and Kicad. ? Real Time Operating Systems (RTOS): FreeRTOS, Zephyr RTOS, TI-RTOS, POSIX. Javier Longares ❝ ?????? ?????? ???? ???? ????????? ?? ???? ????????, ??? ??? ? ???? ????????? ??? ?? ??????????? ????????? ?? ?????? ??????. ?? ?? ??????? ?? ???????, ??? ??????? ?? ??????? ????? ?? ??? ???? ????????? ???. ?? ???? ???? ????????? ???? ?????? ????? ???? ??? ???-???? ??? ?? ???????????? ??? ??????? ? ????????????? ????????? ???????? ??? ??, ????????????? ???? ??? ???????? ??? ???????? ??????????. ❞ ? ????? ???? ??? ?? ????????????? ? ❝ ?????? ??? ?????? ???? ?? ???? ????. ?? ??? ?????????????, ?????????? ??? ???????????? ??? ???? ?????? ??????????????? ??? ??? ?? ???????? ??? ???????? ??? ??????????. ?? ???? ????????? ??????? ???? ?? ?????? ????? ??????? ???? ?????? ??? ???? ??? ??? ??? ?????? ??? ??????????????? ?? ??? ?? ???????. ❞ ? ???? ????? ??? ?? ?????????? ?
Verifications
On time
100%
On budget
100%
Accept rate
100%
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Portfolio

Portfolio

3244005
The project consist of end devices, powered with batteries, sending periodically the data obtained from its 3 PIR sensors to a central through BLE. Microcontroller used was NRF518222
BLE project based on Nordic NRF microcontrollers
The project consist of end devices, powered with batteries, sending periodically the data obtained from its 3 PIR sensors to a central through BLE. Microcontroller used was NRF518222
BLE project based on Nordic NRF microcontrollers
3243999
Based on a TM4C1294XL board, it has been developed a software in charge of monitoring a door sensor and 2 DHT22 sensors for sending SMS when the door is opened or when the temperature is out of a given threshold. Tasks done: * Low level hardware libraries for dealing with GPIO and temperature sensors * RTOS porting * TCP/IP stack porting * Tasks for TCP, UDP, SMS, Door sensor and temperature monitoring
Sending SMS with a TIVA board
Based on a TM4C1294XL board, it has been developed a software in charge of monitoring a door sensor and 2 DHT22 sensors for sending SMS when the door is opened or when the temperature is out of a given threshold. Tasks done: * Low level hardware libraries for dealing with GPIO and temperature sensors * RTOS porting * TCP/IP stack porting * Tasks for TCP, UDP, SMS, Door sensor and temperature monitoring
Sending SMS with a TIVA board
Based on a TM4C1294XL board, it has been developed a software in charge of monitoring a door sensor and 2 DHT22 sensors for sending SMS when the door is opened or when the temperature is out of a given threshold. Tasks done: * Low level hardware libraries for dealing with GPIO and temperature sensors * RTOS porting * TCP/IP stack porting * Tasks for TCP, UDP, SMS, Door sensor and temperature monitoring
Sending SMS with a TIVA board
Based on a TM4C1294XL board, it has been developed a software in charge of monitoring a door sensor and 2 DHT22 sensors for sending SMS when the door is opened or when the temperature is out of a given threshold. Tasks done: * Low level hardware libraries for dealing with GPIO and temperature sensors * RTOS porting * TCP/IP stack porting * Tasks for TCP, UDP, SMS, Door sensor and temperature monitoring
Sending SMS with a TIVA board
Based on a TM4C1294XL board, it has been developed a software in charge of monitoring a door sensor and 2 DHT22 sensors for sending SMS when the door is opened or when the temperature is out of a given threshold. Tasks done: * Low level hardware libraries for dealing with GPIO and temperature sensors * RTOS porting * TCP/IP stack porting * Tasks for TCP, UDP, SMS, Door sensor and temperature monitoring
Sending SMS with a TIVA board
3243976
Development of libraries for dealing with CR95HF module with a STM32F429i Discovery board in order to read RFID tags
RFID in STM32F429i Discovery board
Development of libraries for dealing with CR95HF module with a STM32F429i Discovery board in order to read RFID tags
RFID in STM32F429i Discovery board
Development of libraries for dealing with CR95HF module with a STM32F429i Discovery board in order to read RFID tags
RFID in STM32F429i Discovery board
3243957
Implementation of new features and maintenance tasks for bug fixing of firmware of an existing firmware. Device is powered with batteries, with a 8-bit microcontroller. It takes temperature measurements and generate a PDF file with the historical data logged.
Firmware maintenance tasks
3243929
I've developed from scratch a device based in a PIC32MX microcontroller, in order to get data from a PLC, communicating using Ethernet/IP protocol. Tasks performed were: * Low level libraries for dealing with hardware peripherals * Porting of a RTOS * Proting of a TCP/IP stack * Porting of a Ethernet/IP stack * Specific tasks for TCP, UDP, Ethernet/IP, I/Os, etc * Management of the outsourcing for performing the PCB, guiding the contractor for capturing schematics, PCB routing, prototype manufacturing...
Ethernet/IP running on an embedded device
I've developed from scratch a device based in a PIC32MX microcontroller, in order to get data from a PLC, communicating using Ethernet/IP protocol. Tasks performed were: * Low level libraries for dealing with hardware peripherals * Porting of a RTOS * Proting of a TCP/IP stack * Porting of a Ethernet/IP stack * Specific tasks for TCP, UDP, Ethernet/IP, I/Os, etc * Management of the outsourcing for performing the PCB, guiding the contractor for capturing schematics, PCB routing, prototype manufacturing...
Ethernet/IP running on an embedded device
3243853
This project was based on a STM32F407 microcontroller, connected through a parallel interface to a low cost and low resolution B&W LCD. It also had a keypad and a modbus interface. The device had different menus and the user was able to navigate in different views, each view was composed of several variables whose values were refreshed in real time. Also the user were able to modify them or to visualize a set of variables in different view formats (bar diagrams, clocks, waveforms...)/Users/Javier/Downloads/IMG_5682.MOV
Low cost Graphic Display Unit developed for Power Electronic
This project was based on a STM32F407 microcontroller, connected through a parallel interface to a low cost and low resolution B&W LCD. It also had a keypad and a modbus interface. The device had different menus and the user was able to navigate in different views, each view was composed of several variables whose values were refreshed in real time. Also the user were able to modify them or to visualize a set of variables in different view formats (bar diagrams, clocks, waveforms...)/Users/Javier/Downloads/IMG_5682.MOV
Low cost Graphic Display Unit developed for Power Electronic
This project was based on a STM32F407 microcontroller, connected through a parallel interface to a low cost and low resolution B&W LCD. It also had a keypad and a modbus interface. The device had different menus and the user was able to navigate in different views, each view was composed of several variables whose values were refreshed in real time. Also the user were able to modify them or to visualize a set of variables in different view formats (bar diagrams, clocks, waveforms...)/Users/Javier/Downloads/IMG_5682.MOV
Low cost Graphic Display Unit developed for Power Electronic
3244005
The project consist of end devices, powered with batteries, sending periodically the data obtained from its 3 PIR sensors to a central through BLE. Microcontroller used was NRF518222
BLE project based on Nordic NRF microcontrollers
The project consist of end devices, powered with batteries, sending periodically the data obtained from its 3 PIR sensors to a central through BLE. Microcontroller used was NRF518222
BLE project based on Nordic NRF microcontrollers
3243999
Based on a TM4C1294XL board, it has been developed a software in charge of monitoring a door sensor and 2 DHT22 sensors for sending SMS when the door is opened or when the temperature is out of a given threshold. Tasks done: * Low level hardware libraries for dealing with GPIO and temperature sensors * RTOS porting * TCP/IP stack porting * Tasks for TCP, UDP, SMS, Door sensor and temperature monitoring
Sending SMS with a TIVA board
Based on a TM4C1294XL board, it has been developed a software in charge of monitoring a door sensor and 2 DHT22 sensors for sending SMS when the door is opened or when the temperature is out of a given threshold. Tasks done: * Low level hardware libraries for dealing with GPIO and temperature sensors * RTOS porting * TCP/IP stack porting * Tasks for TCP, UDP, SMS, Door sensor and temperature monitoring
Sending SMS with a TIVA board
Based on a TM4C1294XL board, it has been developed a software in charge of monitoring a door sensor and 2 DHT22 sensors for sending SMS when the door is opened or when the temperature is out of a given threshold. Tasks done: * Low level hardware libraries for dealing with GPIO and temperature sensors * RTOS porting * TCP/IP stack porting * Tasks for TCP, UDP, SMS, Door sensor and temperature monitoring
Sending SMS with a TIVA board
Based on a TM4C1294XL board, it has been developed a software in charge of monitoring a door sensor and 2 DHT22 sensors for sending SMS when the door is opened or when the temperature is out of a given threshold. Tasks done: * Low level hardware libraries for dealing with GPIO and temperature sensors * RTOS porting * TCP/IP stack porting * Tasks for TCP, UDP, SMS, Door sensor and temperature monitoring
Sending SMS with a TIVA board
Based on a TM4C1294XL board, it has been developed a software in charge of monitoring a door sensor and 2 DHT22 sensors for sending SMS when the door is opened or when the temperature is out of a given threshold. Tasks done: * Low level hardware libraries for dealing with GPIO and temperature sensors * RTOS porting * TCP/IP stack porting * Tasks for TCP, UDP, SMS, Door sensor and temperature monitoring
Sending SMS with a TIVA board
3243976
Development of libraries for dealing with CR95HF module with a STM32F429i Discovery board in order to read RFID tags
RFID in STM32F429i Discovery board
Development of libraries for dealing with CR95HF module with a STM32F429i Discovery board in order to read RFID tags
RFID in STM32F429i Discovery board
Development of libraries for dealing with CR95HF module with a STM32F429i Discovery board in order to read RFID tags
RFID in STM32F429i Discovery board
3243957
Implementation of new features and maintenance tasks for bug fixing of firmware of an existing firmware. Device is powered with batteries, with a 8-bit microcontroller. It takes temperature measurements and generate a PDF file with the historical data logged.
Firmware maintenance tasks
3243929
I've developed from scratch a device based in a PIC32MX microcontroller, in order to get data from a PLC, communicating using Ethernet/IP protocol. Tasks performed were: * Low level libraries for dealing with hardware peripherals * Porting of a RTOS * Proting of a TCP/IP stack * Porting of a Ethernet/IP stack * Specific tasks for TCP, UDP, Ethernet/IP, I/Os, etc * Management of the outsourcing for performing the PCB, guiding the contractor for capturing schematics, PCB routing, prototype manufacturing...
Ethernet/IP running on an embedded device
I've developed from scratch a device based in a PIC32MX microcontroller, in order to get data from a PLC, communicating using Ethernet/IP protocol. Tasks performed were: * Low level libraries for dealing with hardware peripherals * Porting of a RTOS * Proting of a TCP/IP stack * Porting of a Ethernet/IP stack * Specific tasks for TCP, UDP, Ethernet/IP, I/Os, etc * Management of the outsourcing for performing the PCB, guiding the contractor for capturing schematics, PCB routing, prototype manufacturing...
Ethernet/IP running on an embedded device
3243853
This project was based on a STM32F407 microcontroller, connected through a parallel interface to a low cost and low resolution B&W LCD. It also had a keypad and a modbus interface. The device had different menus and the user was able to navigate in different views, each view was composed of several variables whose values were refreshed in real time. Also the user were able to modify them or to visualize a set of variables in different view formats (bar diagrams, clocks, waveforms...)/Users/Javier/Downloads/IMG_5682.MOV
Low cost Graphic Display Unit developed for Power Electronic
This project was based on a STM32F407 microcontroller, connected through a parallel interface to a low cost and low resolution B&W LCD. It also had a keypad and a modbus interface. The device had different menus and the user was able to navigate in different views, each view was composed of several variables whose values were refreshed in real time. Also the user were able to modify them or to visualize a set of variables in different view formats (bar diagrams, clocks, waveforms...)/Users/Javier/Downloads/IMG_5682.MOV
Low cost Graphic Display Unit developed for Power Electronic
This project was based on a STM32F407 microcontroller, connected through a parallel interface to a low cost and low resolution B&W LCD. It also had a keypad and a modbus interface. The device had different menus and the user was able to navigate in different views, each view was composed of several variables whose values were refreshed in real time. Also the user were able to modify them or to visualize a set of variables in different view formats (bar diagrams, clocks, waveforms...)/Users/Javier/Downloads/IMG_5682.MOV
Low cost Graphic Display Unit developed for Power Electronic
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5.0 · 1 Review
Reviews
User Avatar
Design a Small Bluetooth Circuit with 3 Buttons and Battery Power • $24 USD
Completed the project within the scope and timeline I required.
Michael V.
@Southpaw404
•
Flag of
boston, Canada
•
9 years ago
Share
Experience
Senior Firmware Engineer / Senior Embedded Software Engineer
Oct, 2014 - Jul, 2016
•
1 year, 9 months
Power Electronics
Oct, 2014 - Jul, 2016
•
1 year, 9 months
Firmware development from scratch for several products manufactured by the company. Between others, developing of a HMI using a very low cost device conected to a STM32 microcontroller. As graphic library I used emWin, with very good results considering that it was a low resolution LCD of 2$. Contribution to the Power Electronics iOS app. Contribution to firmware electronics on other products as well as supporting legacy versions.
Oct, 2014 - Jul, 2016
•
1 year, 9 months
Firmware Engineer / Embedded Software Engineer
Jan, 2014 - Oct, 2014
•
9 months
Qualcomm Europe
Jan, 2014 - Oct, 2014
•
9 months
Firmware maintenance of a device embedded in trucks for fleet management which was programmed on C++ using a ST microcontroller, uBlox module for GPS and NMEAS data, and GSM. It also got vehicle information through CAN. I also performed maintenance tasks on a HMI device used for the truck driver, which has a touch panel, and was programmed in C# using Windows CE. I helped the company to the development of the new platform, making Hardware Abstraction Layer modules, and tesing these modules.
Jan, 2014 - Oct, 2014
•
9 months
Firmware Engineer / Embedded Software Engineer
Sep, 2011 - Dec, 2013
•
2 years, 3 months
By Techdesign
Sep, 2011 - Dec, 2013
•
2 years, 3 months
Design of embedded firmware for the microcontrollers of the products manufacutred by the company. Design of prebuilt libraries used by the company in order to develop further products faster. Among others, I developed the products for managing the safe boxes locks in the banks, locks, I/O modules, devices for door management, and for access controls, using biometric sensors, MiFare readers, or both.
Sep, 2011 - Dec, 2013
•
2 years, 3 months
Education
Universitat Autònoma de Barcelona
2009 - 2010
•
1 year
Master of Business Administration
Flag of
Spain
2009 - 2010
•
1 year
Universidad de Zaragoza
2000 - 2005
•
5 years
Electronic Engineer
Flag of
Spain
2000 - 2005
•
5 years
Publications
Problems Solving for Wireless Sensor Networks
Springer
ISBN 978-1-84800-202-9 As part of the researches performed in EU strategic projects in which I participated between 2006 and 2009, I collaborated to this book and thus I'm mentioned as contributor
Certifications
C Programming - Level 1
C Programming
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