I have built a variety of Arduino/AVR Based projects, ranging from firmware only projects, to firmware to electronic circuit design and PCB Design and Prototype. I have worked with various sensors and peripherals such as USB to Serial converters, RF modules, GSM modules, Bluetooth Modules, Contactors for high power applications. As well as debugging firmware at the hardware level. We can discuss your project and find the best solution according to your needs. Regards, Lesther.