Own operating system for mobile data collection device

Software: dynamic radio network protocol, Preemptive multitaskingsystem

Hardware: Radio communication

Sensor evaluation for hot runner safety system…

Multi-threads, quasi real-time, high error redundancy, multi-master, multi-slave

Software: C++, Visual C/C++

Client/end customer: SST GmbH, Deutsche Bahn AG

IoT radio module ("Dashbutton") with battery charging via USB…

Network: Connection via WLAN - WIFI 2.4G ~ 2.5G (2400M ~ 2483.5M) 802.11 b / g / n / e / i. Connections: Connection for 4 buttons with protective circuit (IEC 61000-4-2 ESD Protection (Level 4), ± 8-kV Contact Discharge, ± 15-kV Air-Gap Discharge) - with wake-up function from sleep mode; Connection for 4 digital sources - with wake-up function from sleep mode Connection for 2 analogue sources. Signal generator: Multi-colored LED for visual status messages: blue "in progress", green "ok", red "error" (can be switched off), beeper for acoustic notification of status or error messages (can be switched off). Power supply: Power supply via USB and / or battery (Li-Ion) with automatic switchover and battery trickle charging, intelligent charging circuit with various protective circuits (500mA USB input current limit, inrush current limiter, precharge and fast-charge safety timers, termination current, reverse current , Short-Circuit, Thermal Protection), Two Li-ION battery options: 18650 (∅18mm, length 650mm) or the smaller variant 18350 (∅18mm, length 350mm); 3.3V voltage regulator: up to 96% efficiency, buck-boost (use of full battery capacity), shutdown at 3.15V (to protect the battery), overtemperature protection; Reliable, stable and vibration-proof battery holder thanks to spring clips. Energy management: Long runtime thanks to extremely energy-saving (0.02mA / 20µA) operation with the 3.3V voltage regulator switched off in sleep mode (waiting for the next action or safety timer); Safety - Safety features: Configurable control interval (safety timer) for self-diagnosis: battery level, WLAN connectivity, etc.

Software: Ansi C, FreeRTOS, PIC-16 Assembler, Interface specification, Threads, XC8

Hardware: Analog Technology, Design of complex control systems, Electronics development, ESP-Microcontroller, Radio communication, Gatter, Li-Ion charging technology, MicroChip PIC-Microcontroller, Microprozessoren, Circuit board layout, Circuit design, Circuit design

IoT sensor module (temperature / humidity)

Sensor platform for sensors for connection to the IoT radio module via a MultiMaster RS485 bus.

Software: Ansi C, PIC-16 Assembler, Interface specification, Threads, XC8

Hardware: Analog Technology, Design of complex control systems, Electronics development, MicroChip PIC-Microcontroller, Microprozessoren, Circuit board layout, Circuit design, Circuit design