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Trang L.

@TrangLee99

4.7
2
2.5
2.5
50%

Senior Embedded Software Engineer

$20 USD / Hour
・
Flag of
Vietnam (1:53 AM)
・
Joined on May 3, 2024
$20 USD / Hour
・
I'm an expert in developing smart embedded devices in the field of wireless networks and MCUs. There are also other projects: - Touch Switch uses NXP's MKL16Z32/MC9S08, CY8CMBR3 ... - Energy saving sensors like PIR, door... used module Zigbee (MGM111A/EFR32MG21) of Silabs. - Smart Lock with NFC Card Reader - Porting source code chip MCU as MKL, STM8/32, PIC, ARDUINO ... - The gateway zigbee communicate Modbus RTU with Energy meter of HONGFA - Module InOut used chip Z500/Z700 Zwave of Silabs - ESP32 Matter such as switch, sensor smoke ... - ESP32 MQTT/HTTP/TCPIP/UDP - LORA mesh using SX1276 chip - ESP32 Ethernet/Modbus RS232/TCPIP - Smart street lighting use Wi-SUN network such as VC7300 Vertexcom / FG25 Silabs - BTS Station use SIMCOM A7600
Verifications
On time
81%
On budget
81%
Accept rate
100%
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Portfolio

Portfolio

11880227
The Wi-Fi controlled MCB (Miniature Circuit Breaker) is a compact and efficient device that allows users to remotely control and monitor their electrical circuits using Wi-Fi Matter connectivity. Here are some key features of our product: – Operating voltage: 220VAC – Remote Control: On/Off – Power monitoring: U, I, P, Kwh ... – Notifications: overload, overvoltage, undervoltage, ... – Setting advance: maintain locking, auto close ... – RS485 communication (4-pin terminal) – Network: Zigbee 3.0 / Wifi Matter / Wifi MQTT NOTE: As the lead firmware engineer, I have a deep understanding of the operation principles of wireless networks with router devices and organized a layered structure for firmware
Smart Miniature Circuit Breaker - Smart Home
11880176
The sensor has the function of detecting changes in position or movement of objects in the surrounding environment, sending status to the Home Controller or App/Server. Here are some key features of our product: – Operating voltage: Battery AAA – Light measurement range: 0 – 10,000 lux – Temperature measurement range: 0 ° C – 100 ° C – Humidity measurement range: 0 – 100% – Maximum recognition angle: 102 ° – Network: Zigbee 3.0 / Zwave / Wifi Matter / BLE mesh NOTE: As the lead firmware engineer, I have a deep understanding of the operation principles of wireless networks with sleepy end-devices and organized a layered structure for firmware.
Motion Detecting Sensor - Smart Home
11880205
The Indoor Positioning System (IPS) using Ultra-Wide Band (UWB) technology provides accurate real-time location tracking within indoor environments. By utilizing UWB signals, it enables precise positioning of objects or individuals in areas where GPS may be unreliable or unavailable, such as inside buildings or underground. The system consists of 1 tag and 3 anchors utilizing Ultra-Wide Band (UWB) technology for indoor positioning. The tag is a mobile device attached to the item or user to be located. Anchors are fixed devices placed at predetermined positions within the space. When the tag emits UWB signals, the anchors receive these signals and use the time and delay of the signals to calculate the distance between the tag and anchor. Based on this information, the system can determine the tag's position in three-dimensional space with high accuracy. NOTE: As the lead firmware engineer, I have a deep understanding of the operation principles of wireless networks.
Indoor Positioning System Using Ultra-Wide Band
11880227
The Wi-Fi controlled MCB (Miniature Circuit Breaker) is a compact and efficient device that allows users to remotely control and monitor their electrical circuits using Wi-Fi Matter connectivity. Here are some key features of our product: – Operating voltage: 220VAC – Remote Control: On/Off – Power monitoring: U, I, P, Kwh ... – Notifications: overload, overvoltage, undervoltage, ... – Setting advance: maintain locking, auto close ... – RS485 communication (4-pin terminal) – Network: Zigbee 3.0 / Wifi Matter / Wifi MQTT NOTE: As the lead firmware engineer, I have a deep understanding of the operation principles of wireless networks with router devices and organized a layered structure for firmware
Smart Miniature Circuit Breaker - Smart Home
11880176
The sensor has the function of detecting changes in position or movement of objects in the surrounding environment, sending status to the Home Controller or App/Server. Here are some key features of our product: – Operating voltage: Battery AAA – Light measurement range: 0 – 10,000 lux – Temperature measurement range: 0 ° C – 100 ° C – Humidity measurement range: 0 – 100% – Maximum recognition angle: 102 ° – Network: Zigbee 3.0 / Zwave / Wifi Matter / BLE mesh NOTE: As the lead firmware engineer, I have a deep understanding of the operation principles of wireless networks with sleepy end-devices and organized a layered structure for firmware.
Motion Detecting Sensor - Smart Home
11880205
The Indoor Positioning System (IPS) using Ultra-Wide Band (UWB) technology provides accurate real-time location tracking within indoor environments. By utilizing UWB signals, it enables precise positioning of objects or individuals in areas where GPS may be unreliable or unavailable, such as inside buildings or underground. The system consists of 1 tag and 3 anchors utilizing Ultra-Wide Band (UWB) technology for indoor positioning. The tag is a mobile device attached to the item or user to be located. Anchors are fixed devices placed at predetermined positions within the space. When the tag emits UWB signals, the anchors receive these signals and use the time and delay of the signals to calculate the distance between the tag and anchor. Based on this information, the system can determine the tag's position in three-dimensional space with high accuracy. NOTE: As the lead firmware engineer, I have a deep understanding of the operation principles of wireless networks.
Indoor Positioning System Using Ultra-Wide Band
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4.7 · 2 Reviews
Reviews
User Avatar
Project for Trang L. -- 2 • ₹3,000 INR
Good knowledge with professionalism
Gandham A.
@ArunSaiGandham
•
Flag of
Kakinada (rural), India
•
6 months ago
Share
M
Zigbee, Thread, WiSUN Firmware Engineer • $200 SGD
I had the pleasure of working with Trang Lee, and I must say she is an outstanding firmware engineer. Trang's technical expertise is truly impressive; she consistently delivers high-quality work and demonstrates a deep understanding of firmware development. Moreover, Trang's dedication and work ethic are commendable.
Closed User
@moonlightangel96
•
Flag of
,
•
7 months ago
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Experience
Senior Embedded Software Engineer
Jan, 2018 - May, 2024
•
6 years, 4 months
Lumi Smarthome
Jan, 2018 - May, 2024
•
6 years, 4 months
1. Software Developer - Wireless network protocol - Software development for Zigbee/Zwave/Wifi Application 2. Software Developer - Actuator/Sensor devices - Research and development of capacitive touch technology for Touch switch devices - Control on/off, dimming resistive load, inductive load, high power load - Motion sensor, door sensor, infrared, door lock
Jan, 2018 - May, 2024
•
6 years, 4 months
Education
Truòng Dai hoc Bách Khoa Hànôi
2013 - 2018
•
5 years
Bachelor of Engineering (BEng)
Flag of
Vietnam
2013 - 2018
•
5 years
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