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Radio Frequency Engineering
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$65 USD / hora
Bandera de TURKEY
üsküdar, turkey
$65 USD / hora
Aquí son las 4:01 a. m.
Se unió el julio 28, 2019
1 Recomendación

Amr B.

@HelmPCB

 5,0 (2 comentarios)
3,9
3,9
100%
100%
$65 USD / hora
Bandera de TURKEY
üsküdar, turkey
$65 USD / hora
100 %
Trabajos finalizados
100 %
Dentro del presupuesto
100 %
A tiempo
N/A
Tasa de recontratación

Embedded Systems Engineer

[login to view URL] I am a seasoned embedded systems engineer (12 years industrial experience) with a PhD in Mechatronics and Robotics, specialising in the full hardware and firmware development of embedded systems: • ARM Cortex-M0, M3, M4 micros (Nordic nRF, STM32 series, NXP LPC series). • Microchip 8, 16 and 32-bit PICs. • Low-power IoT (BLE, NFC, LoRa, Apache mynewt). • Embedded Linux systems (U-boot, kernel, devicetree, drivers, root file system, userspace app development). • Software Defined Radio (GNURadio, LimeSDR). • GSM/GPRS/3G/4G, GPS. • Antenna transmission line design and matching. • Motors, solenoids, linear actuators, valves... • Multi-layer SMD/BGA PCB design in KiCad, Proteus. • Firmware development in C (Keil, MPLAB). • Software development in .NET, Go, Python. • Full technical documentation generation. • Design for EMC. • ATEX/IECEx Intrinsic Safety. • Mechanical design using Solidworks (Certified Solidworks Professional). • Prototyping using 3D printers.
Freelancer Radio Frequency Engineers Turkey
Ver todo Radio Frequency Engineers en Turkey

Contacta Amr B. sobre tu trabajo

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Portafolio

5562703
The aim of this project was the monitor the number of coins passing through a coin-acceptor unit (as used in coin-operated games) and report the total number to a web server via HTTP. Various inputs and outputs are used to interface with the game system itself. After understanding the customer specification, I designed both the PCB and wrote the firmware that runs on the STM32 micro. After manufacturing a prototype and demonstrating that to the customer, I then assisted them in getting 65 PCBs made using contract manufacturers and provided information on how to program and test the units. - STM32L051C6 microcontroller, with firmware written in C using the Keil IDE and CubeMX software. - SIM800C module used for GPRS communication. - 2-layer PCB design in KiCad. - 5V SMPS power supply design.
GSM Monitoring System for Coin-operated Games
5190098
VisiLevel is an ATEX/IECEx certified liquid level measuring system for road fuel tankers comprising: • Probes that measure liquid level, density, temperature and colour and communicate over CAN. • LCD display unit that displays probe data. • ATEX power supply and CAN repeater that provides power and allows third party communication. VisiLevel was a major R&D project, spanning almost a decade of development. I have been involved in the VisiLevel project from its early days, including: • Working on early prototypes and developing proof-of-concept versions. • PCB design of sensor probes and ATEX SMPS power supply. • Mechanical design of CNC aluminium probe housing and ICB-400 power supply enclosure, including seal design. • Firmware development for both the display unit and the sensor probes. • ATEX/IECEx certification of the entire project, including technical documentation, EMC/IP testing, working with notified body, acting as ATEX representative.
VisiLevel Liquid Level Measurement System
VisiLevel is an ATEX/IECEx certified liquid level measuring system for road fuel tankers comprising: • Probes that measure liquid level, density, temperature and colour and communicate over CAN. • LCD display unit that displays probe data. • ATEX power supply and CAN repeater that provides power and allows third party communication. VisiLevel was a major R&D project, spanning almost a decade of development. I have been involved in the VisiLevel project from its early days, including: • Working on early prototypes and developing proof-of-concept versions. • PCB design of sensor probes and ATEX SMPS power supply. • Mechanical design of CNC aluminium probe housing and ICB-400 power supply enclosure, including seal design. • Firmware development for both the display unit and the sensor probes. • ATEX/IECEx certification of the entire project, including technical documentation, EMC/IP testing, working with notified body, acting as ATEX representative.
VisiLevel Liquid Level Measurement System
VisiLevel is an ATEX/IECEx certified liquid level measuring system for road fuel tankers comprising: • Probes that measure liquid level, density, temperature and colour and communicate over CAN. • LCD display unit that displays probe data. • ATEX power supply and CAN repeater that provides power and allows third party communication. VisiLevel was a major R&D project, spanning almost a decade of development. I have been involved in the VisiLevel project from its early days, including: • Working on early prototypes and developing proof-of-concept versions. • PCB design of sensor probes and ATEX SMPS power supply. • Mechanical design of CNC aluminium probe housing and ICB-400 power supply enclosure, including seal design. • Firmware development for both the display unit and the sensor probes. • ATEX/IECEx certification of the entire project, including technical documentation, EMC/IP testing, working with notified body, acting as ATEX representative.
VisiLevel Liquid Level Measurement System
5171993
I was responsible for the full software development of a LoRaWAN gateway designed by Yaşam Teknik with the following specs: • Raspberry Pi 3-based system. • Up to 16 LoRa channels. • Backhaul via 4G. • OTA update and remote management. I provided advice on which components to use that had good driver support in the mainline Linux kernel. I developed a custom Linux OS for the gateway using Buildroot which involved the following: • Replacing RPi bootloader with U-boot. • Configuring Linux kernel and adding necessary drivers. • Modifying I2C expander driver to allow pullups to be specified in devicetree. • Modifying devicetree. • Modifying U-boot to allow integration with OTA update system. • Development of secure remote management tools. • Development of distributed LoRaWAN network server in Python. • Development of web-based admin and dashboard pages using Django and Node-red. • Development of custom LoRa radio manager in Go.
LoRaWAN Gateway
I was responsible for the full software development of a LoRaWAN gateway designed by Yaşam Teknik with the following specs: • Raspberry Pi 3-based system. • Up to 16 LoRa channels. • Backhaul via 4G. • OTA update and remote management. I provided advice on which components to use that had good driver support in the mainline Linux kernel. I developed a custom Linux OS for the gateway using Buildroot which involved the following: • Replacing RPi bootloader with U-boot. • Configuring Linux kernel and adding necessary drivers. • Modifying I2C expander driver to allow pullups to be specified in devicetree. • Modifying devicetree. • Modifying U-boot to allow integration with OTA update system. • Development of secure remote management tools. • Development of distributed LoRaWAN network server in Python. • Development of web-based admin and dashboard pages using Django and Node-red. • Development of custom LoRa radio manager in Go.
LoRaWAN Gateway
5171980
As part of the Smart Cities project at Yaşam Teknik, I was responsible for the hardware and firmware development of a LoRa-powered smart water meter with the following features: • Supports both volumetric and ultrasonic measurement methods. • Low-power design, lasting over 10 years on a single lithium battery. • Uses LoRa for long-range communications. • Uses BLE and NFC to allow secure communication with an Android app to allow service engineers to configure the device. The design is based around the Telit RE866 module, which integrates both the Nordic nRF52832 low-power micro and the Semtech SX1272 LoRa transceiver. The PCB is a 4-layer board design using KiCad. The on-board LoRa antenna was matched to 50ohms using a network analyser. For the firmware, I chose to use Apache mynewt due to its open-source BLE stack and SX1272 support. I also developed a prototype Android application that used the NFC and BLE features to communicate with the water meter for config and maintenance.
LoRa-powered Smart Water Meter with BLE/NFC
5562703
The aim of this project was the monitor the number of coins passing through a coin-acceptor unit (as used in coin-operated games) and report the total number to a web server via HTTP. Various inputs and outputs are used to interface with the game system itself. After understanding the customer specification, I designed both the PCB and wrote the firmware that runs on the STM32 micro. After manufacturing a prototype and demonstrating that to the customer, I then assisted them in getting 65 PCBs made using contract manufacturers and provided information on how to program and test the units. - STM32L051C6 microcontroller, with firmware written in C using the Keil IDE and CubeMX software. - SIM800C module used for GPRS communication. - 2-layer PCB design in KiCad. - 5V SMPS power supply design.
GSM Monitoring System for Coin-operated Games
5190098
VisiLevel is an ATEX/IECEx certified liquid level measuring system for road fuel tankers comprising: • Probes that measure liquid level, density, temperature and colour and communicate over CAN. • LCD display unit that displays probe data. • ATEX power supply and CAN repeater that provides power and allows third party communication. VisiLevel was a major R&D project, spanning almost a decade of development. I have been involved in the VisiLevel project from its early days, including: • Working on early prototypes and developing proof-of-concept versions. • PCB design of sensor probes and ATEX SMPS power supply. • Mechanical design of CNC aluminium probe housing and ICB-400 power supply enclosure, including seal design. • Firmware development for both the display unit and the sensor probes. • ATEX/IECEx certification of the entire project, including technical documentation, EMC/IP testing, working with notified body, acting as ATEX representative.
VisiLevel Liquid Level Measurement System
VisiLevel is an ATEX/IECEx certified liquid level measuring system for road fuel tankers comprising: • Probes that measure liquid level, density, temperature and colour and communicate over CAN. • LCD display unit that displays probe data. • ATEX power supply and CAN repeater that provides power and allows third party communication. VisiLevel was a major R&D project, spanning almost a decade of development. I have been involved in the VisiLevel project from its early days, including: • Working on early prototypes and developing proof-of-concept versions. • PCB design of sensor probes and ATEX SMPS power supply. • Mechanical design of CNC aluminium probe housing and ICB-400 power supply enclosure, including seal design. • Firmware development for both the display unit and the sensor probes. • ATEX/IECEx certification of the entire project, including technical documentation, EMC/IP testing, working with notified body, acting as ATEX representative.
VisiLevel Liquid Level Measurement System
VisiLevel is an ATEX/IECEx certified liquid level measuring system for road fuel tankers comprising: • Probes that measure liquid level, density, temperature and colour and communicate over CAN. • LCD display unit that displays probe data. • ATEX power supply and CAN repeater that provides power and allows third party communication. VisiLevel was a major R&D project, spanning almost a decade of development. I have been involved in the VisiLevel project from its early days, including: • Working on early prototypes and developing proof-of-concept versions. • PCB design of sensor probes and ATEX SMPS power supply. • Mechanical design of CNC aluminium probe housing and ICB-400 power supply enclosure, including seal design. • Firmware development for both the display unit and the sensor probes. • ATEX/IECEx certification of the entire project, including technical documentation, EMC/IP testing, working with notified body, acting as ATEX representative.
VisiLevel Liquid Level Measurement System
5171993
I was responsible for the full software development of a LoRaWAN gateway designed by Yaşam Teknik with the following specs: • Raspberry Pi 3-based system. • Up to 16 LoRa channels. • Backhaul via 4G. • OTA update and remote management. I provided advice on which components to use that had good driver support in the mainline Linux kernel. I developed a custom Linux OS for the gateway using Buildroot which involved the following: • Replacing RPi bootloader with U-boot. • Configuring Linux kernel and adding necessary drivers. • Modifying I2C expander driver to allow pullups to be specified in devicetree. • Modifying devicetree. • Modifying U-boot to allow integration with OTA update system. • Development of secure remote management tools. • Development of distributed LoRaWAN network server in Python. • Development of web-based admin and dashboard pages using Django and Node-red. • Development of custom LoRa radio manager in Go.
LoRaWAN Gateway
I was responsible for the full software development of a LoRaWAN gateway designed by Yaşam Teknik with the following specs: • Raspberry Pi 3-based system. • Up to 16 LoRa channels. • Backhaul via 4G. • OTA update and remote management. I provided advice on which components to use that had good driver support in the mainline Linux kernel. I developed a custom Linux OS for the gateway using Buildroot which involved the following: • Replacing RPi bootloader with U-boot. • Configuring Linux kernel and adding necessary drivers. • Modifying I2C expander driver to allow pullups to be specified in devicetree. • Modifying devicetree. • Modifying U-boot to allow integration with OTA update system. • Development of secure remote management tools. • Development of distributed LoRaWAN network server in Python. • Development of web-based admin and dashboard pages using Django and Node-red. • Development of custom LoRa radio manager in Go.
LoRaWAN Gateway
5171980
As part of the Smart Cities project at Yaşam Teknik, I was responsible for the hardware and firmware development of a LoRa-powered smart water meter with the following features: • Supports both volumetric and ultrasonic measurement methods. • Low-power design, lasting over 10 years on a single lithium battery. • Uses LoRa for long-range communications. • Uses BLE and NFC to allow secure communication with an Android app to allow service engineers to configure the device. The design is based around the Telit RE866 module, which integrates both the Nordic nRF52832 low-power micro and the Semtech SX1272 LoRa transceiver. The PCB is a 4-layer board design using KiCad. The on-board LoRa antenna was matched to 50ohms using a network analyser. For the firmware, I chose to use Apache mynewt due to its open-source BLE stack and SX1272 support. I also developed a prototype Android application that used the NFC and BLE features to communicate with the water meter for config and maintenance.
LoRa-powered Smart Water Meter with BLE/NFC

Comentarios

Cambios guardados
Mostrando 1 - 2 de 2 reseñas
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5,0
$1.160,00 AUD
AM SDR Radio Program - Software Defined Radio
Amr was excellent to work with and completed the project beyond expectations. Amr went above the requirements of the project to spec and source hardware at cost price to ensure his software implementation worked on the final product hardware, which it did perfectly.
Electronics
Software Architecture
Telecommunications Engineering
Software Development
Radio Frequency Engineering
N
Bandera de Nathan T.
@nathtip
•
hace 4 años
5,0
$175,00 USD
Radio capture on Linux RTL-SDR using GNU-Radio
excellent work delivered to scope.
C Programming
Python
Linux
Radio Frequency
Radio Frequency Engineering
S
Bandera de Geoff K.
@seclogic
•
hace 4 años

Experiencia

Owner

HelmPCB
jun 2017 - Presente
I currently share my 12 years of industrial experience with customers via my consultancy, HelmPCB, specialising in the design of embedded systems with an emphasis on Embedded Linux, ATEX/IECEX Explosion Proof design, Low Power IoT, BLE and LoRaWAN systems.

Embedded Systems Engineer

Yaşam Teknik A.Ş.
mar 2017 - may 2019 (2 años, 2 meses)
I led the embedded software side of a project aiming at utilising LoRa-powered water meters and LoRaWAN gateways to provide remote management and control of municipal water networks. This involved the development of an embedded Linux system for a LoRaWAN gateway, and the hardware and firmware design of a smart LoRa-powered water meter.

Senior Electronic Engineer

MechTronic Ltd
ago 2007 - nov 2016 (9 años, 3 meses)
I worked at MechTronic for almost 10 years, designing a wide variety of reliable control systems that work in harsh, automotive environments and hazardous locations, such as for road fuel tankers and fuel terminals. This includes: • Vehicle trackers and data loggers. • Sensing and measurement systems. • Additive and pumping control systems. • much more...

Educación

Doctor of Philosophy (Ph.D.), Mechatronics and Robotics

University of Leeds, United Kingdom 2008 - 2015
(7 años)

Bachelor of Engineering (B.Eng.), Mechatronics and Robotics

University of Leeds, United Kingdom 2005 - 2008
(3 años)

Contacta Amr B. sobre tu trabajo

Inicia sesión para comentar cualquier detalle por chat.

Verificaciones

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Facebook conectado

Principales habilidades

Radio Frequency Engineering 2
Linux 1
Electronics 1
Radio Frequency 1
Microcontroller

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