Embedded C code for using 2 PIC as master and slave to control voltage stablizer

AVRlarm is an open source alarm system for 8-Bit Atmel CPUs (ATmega2560).

HW: ATMEGA128- SIM808(GPS-GPRS-GSM)-TTL to PC

Library for MC60.

Library for SIM868.

Library for GL865-QUAD

Library for M95

Example of using ESP32 with GSM modem and lwip+pppos

Ejemplos para curso de platzi "protocolos de comunicaciones para IoT

It uses GPRS and GPS technologies which allows to easily perform realtime tracking. Here idea is simple: read the GPS coordinates (longitude and latitude) and send them by using HTTP request to a web server. Then use a web browser to load the PHP webpage which uses GOOGLE MAPS to show the location in realtime.

Touch Free and GSM based garbage and waste collection bin overflow indicator system for smart cities.

校园卡刷卡消费系统的下位机设计，包括电路图和PCB设计以及基于MSP430单片机的C程序设计

Pressure sensor measured in Real Time and monitored via GSM (SMS) and Mikromedia display.

Generate GSMTAP frames from Sagem OT290 trace phones; mirror of https://gitea.osmocom.org/phone-side/ot290-gsmtap

Experiments with Quectel EC20 modems; mirror of https://gitea.osmocom.org/phone-side/quectel-experiments

Tools to extract ASN.1 syntax from ancient ETSI/3GPP specifications; mirror of https://gitea.osmocom.org/cellular-infrastructure/asn1_docextract

L4：Cortex A5 GSM SoC RDA8810

SIM800L Device Driver for ESP32

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