Aug 21, 2016 · The SIM800 has a microphone input. The signal you are getting from the microcontroller will be at too high a level for that input. The SIM800 expects an electret microphone, so maybe 100mV signal level. You need to lower the output level from the PIC-PWM.

The SIM800c GSM Module is a versatile and compact electronic component that provides GSM/GPRS communication capabilities to embedded systems. It enables devices to make phone calls, send and receive SMS messages, and connect to the internet through GPRS.

Jul 14, 2023 · You would have to check the specifications for the SIM800's MIC input. As it's called "MIC", it's probably expecting a microphone, which is a very low level input - much lower than a speaker!

Jul 5, 2019 · I have this USB-to-GSM Serial-GPRS-SIM800C module and I have successfully been able to send AT commands to it and do stuffs, but what I really wanted was Text to speech capabilities, I was able to generate an AMR audio file, upload it unto the module's internal memory and play it whenever some one calls.

GSM/GPRS Modem-RS232 is built with the Quad-Band GSM/GPRS engine-SIM800C, works on frequencies 850/900/1800/1900MHz. The module comes with RS232 interface, which allows you to connect PC as well as microcontroller with RS232 Chip (MAX232). The baud rate is configurable from 9600-115200 through AT command.

Manuals and User Guides for SimCom SIM800C. We have 1 SimCom SIM800C manual available for free PDF download: Hardware Design. Simcom SIM800C Pdf User Manuals. View online or download Simcom SIM800C Hardware Design.

This document describes how to use SIM800C EVB to do test; user can get useful info about the SIM800C EVB quickly through this document.

Jul 14, 2023 · Connect the audio module ground, then try the 10K resistors again. You need a perfect, direct ground connection (and no ground "loops") between the two modules, to get good audio. Having them separately grounded to the PSU can cause noise. That will apply between any audio source and the SIM800.

Mar 21, 2018 · SIM800C GSM/GPRS RS232 MODEM (DB9), the latest addition to rhydoLABZ GSM/GPRS modem, helps to add wireless connectivity to your project using RS232 UART interface.

This document describes SIM800C hardware interface in great detail. The document can help customer to quickly understand SIM800C interface specifications, electrical and mechanical details.