Browse categories
English
$
USD
Connect to your AI
I will modbus rtu rs485 4 20ma analog sensor integration edge firmware alarms
Embedded Firmware Engineer for Sensor Data Acquisition and Precision
I develop embedded firmware for reliable sensor measurement data acquisition and industrial monitoring using STM32 ESP32 and Arduino. My work covers multi sensor integration timestamped data logging R...
About this Gig
Most industrial sensor projects fail quietly: wrong register offsets, missing scale factors, no live-zero detection, and data that looks fine until the line stops.
I write production firmware that makes existing field sensors talk reliably to your controller. Modbus RTU over RS485, 4-20mA current-loop interfaces, 0-10V analog inputs, and ADC expansion boards are handled with proper engineering units, bus health checks, and edge-level validation.
What buyers actually need (and almost never get from generic gigs):
- Exact register mapping table with data type, byte/word order, scale, unit, and quality flag
- Live-zero and out-of-range detection on every 4-20mA channel so a broken wire is flagged before it cascades
- RS485 direction control, CRC validation, and simple bus health monitoring
- Configurable threshold alarms and fault flags ready for PLC, SCADA, or cloud
- Low-power edge nodes that keep running and buffer data during network outages
This is not another Arduino demo. It is commercial-grade firmware for industrial automation integrators, machine builders, instrumentation companies, and remote monitoring product teams who need clean, documented, testable deliverables.
FAQ
Can you integrate legacy Modbus RTU sensors over RS485 with my existing PLC or controller?
Yes. I handle Modbus RTU master or slave, correct register mapping, scaling, and RS485 bus parameters so your field sensors deliver accurate values.
Do you support both 4-20mA current-loop and 0-10V analog inputs plus ADC expansion boards?
Absolutely. Firmware includes live-zero fault detection on 4-20mA, proper 0-10V scaling, and multi-channel ADC board integration.
Will the firmware include threshold alarms, fault detection, and edge monitoring for remote sites?
Yes. Configurable high/low thresholds, out-of-range flags, and low-power edge nodes that continue monitoring and buffering during outages.
How do you prevent noisy RS485 networks or abnormal readings from reaching the controller?
Direction control, CRC checks, bus health monitoring, and edge-level validation filter bad data before it is forwarded.
What exact deliverables do I receive for an industrial sensor integration project?
Tested firmware source, complete Modbus register mapping table with scaling and units, alarm configuration, and a short validation report ready for production use.
