Software developer
2018 - now
Wittra Sweden AB
Working at a startup in a team developing a IoT Sensor mesh network.
The system is built around a Texas Instruments CC1352 ARM Cortex-M4 processor with lots of onboard sensors,
with an application built on top of TI-RTOS and Contiki-NG. The system is developed for users with little technical
knowledge to be easy to set up and use. The work mostly consists of designing and writing embedded C for the firmware
running on the sensor tags. Occasionally writing Python code running on a single board computer running Linux or in the Cloud,
some hardware debugging and PCB design and helping out with hiring new recruits. The project has a lot of components that have to
cooperate so there is a need for both a high level perspective and in depth technical knowledge to make it work.
Some notable contributions in the project consist of:
Writing low level sensor drivers for ST LSM303AH and Both BMG250.
Adding support for CBOR data structure in embedded firmware.
Designing and implementing a BLE service in Python for updating firmware over the air (FOTA/OTA).
Designing and implementing a protocol to send firmware binaries as chunks over a lossy network (FOTA/OTA).
Adding file support (SPIFFS) to external flash.
Getting and Posting data using CoAP via HTTP proxy to GCP.
Designing a PCB to connect custom hardware to TI Launchpad for development and debugging.
Keywords: C, Python, Git, Scrum, Jira, Code review, IoT, Contiki-NG, SubGHz, 6LowPAN, KiCad, BLE, TI-RTOS, GCP, libcbor, SPIFFS, CoAP, OTA
Daniel is a highly skilled and enthusiastic developer that not only takes part of the actual doing (programming) but is an integral part of each step of development. From bringing up ideas and innovation, to mentoring new colleagues and all the way up to the business part of it, Daniel is a true generalist in the best kind of way.
Wittra colleague
Daniel is a good developer. He write a clean code this documentation and he is always open to discuss about his work.
Wittra colleague
Intelligent thinker, broad knowledge, ability to work in different levels in the software stack, good team player.
Wittra colleague
You help the entire team deliver as one, by helping others when needed and working independently when needed. You reviews are of high quality and you get things done!
Wittra colleague