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Sim800c arduino pinout. Low power consumption: 0.


Sim800c arduino pinout – unserializable. Pinout. Weight: 26g. The Arduino reads GPS data from the NEO 6M and sends it via the SIM800c for communication. 5 TFT Touch Shield with 4MB Flash for Arduino and mbed DFR0347 2. PINOUT: Test Code. The ProMake GSM SIM800C helps to add wireless connectivity to your project using TTL UART interface. From consumer electronics to business and industrial processes, IoT has changed the way we work. It works at quad bands-----GSM850, EGSM900, DCS1800, and PCS1900. Projects. 0 Expansion Shield; Pinout Instructions: Note: It is controlled by the AT command, you can directly start the function through the computer serial port and Arduino motherboard. It doesn’t even run on 3. Software Developement using Arduino. 8V as it appears in the first of the 4 pulses and stay there. However, the Arduino works with a level voltage of 5 volts. document and other SIM800C application notes, customer guide, customers can use SIM800C to designvarious applications quickly. This library may work other gsm shields or modules. Packages 0. I think it's defective architecture/firmware, but unfortunately SIMCOM dropped support for this model, so best 1. Make the ground common between The GPRS/GSM Shield allows you to use the GSM phone network to receive data from a remote location,and it is compatible with all boards with the same form factor (and pin out) as a standard Arduino Board. Code Issues Pull requests sim800 mbed-os sim800c mbedos. Attention: The SIM800 works with a logic level voltage of 3. Here I first remove the ATD command and the delay. Code: #include <SoftwareSerial. I need that to Shield For Arduino. I have this problem with my sim800c gsm module which i cannot send AT commands here is my setup code: #include <SoftwareSerial. Figure 3 – SIM800C back view. The updated version of PZEM004T is best for the DIY project, where we need to measure the voltage, current, power, energy, frequency, Power factor (frequency and PF is Figure 2 – SIM800C front view. Learn how to sends SMS, receive SMS, make and receive phone calls with Arduino. But make sure to checkout Hello, I have an arduino UNO and a SIM800C, the AT commands work very well, but it does not connect to the network when I request the network signal with "AT + CSQ" it says "AT + CSQ: 0, 0 " Connection: VCC -> VDC 5V GND -> GND PWK (PWR) -> GND TX -> D3 RX -> D2 Thank you for your help in advance, cordially You can send & receive messages using SIM800L with Arduino, even can you this GSM module with Arduino to make calls as well. Custom properties. 3V Peak Current : 700mA V BA T V BA T GND Modul e 5. Connection & Pinouts. The below DFR0360 XSP - Arduino Programmer DFR0356 Bluno Beetle Shield DFR0355 SIM808 with Leonardo mainboard DFR0351 Romeo BLE mini V2. DHT11 sensor has four pins: GND pin: needs to be I open the Arduino IDE program with the sketch from the last video. I send the 'AT+CPIN' and get the response 'SIM Not Inserted' I think I've tracked it down to the SIM_VDD not supplying This post is a complete guide to the SIM900 GSM GPRS Shield with the Arduino. Pin Details: At the backside of the module, you can find the pin details printed on it. The SIM800 is a cellular communication module that can make calls, Hello my friends! I have bought 5 sim800c modules, but the are with strange V_TTL pin, and i can not make it communicate with arduino nano or USB-TTL. Also you want to download the sim 800l datasheet. h> SoftwareSerial A7672S(7,8); //RX TX. 2. The module comes with RS232 interface, which allows This is a GPRS/GSM expansion board for Arduino. 4V, Vtyp = 3. Support DTMF. Module Pinout. The code forwards data between the serial monitor and the SIM800C module, allowing users to send AT commands and receive GSM/GPRS Modem-RS232 is built with the Quad-Band GSM/GPRS engine-SIM800C, works on frequencies 850/900/1800/1900MHz. Install This GSM/GPRS development board is based on SIM800C chip supporting Bluetooth function and AT command control via the serial port. researchdesignlab. SIM800C-DS Overview SIM800C-DS is a quad-band GSM/GPRS module that works on frequencies GSM850MHz, EGSM900MHz, DCS1800MHz and PCS1900MHz. 0 Expansion Shield; KS0256 Keyestudio LCD1602 Expansion Shield; PINOUTS. Ensure that the voltage is within the specified range. 5V > 3. We recommend studying for more information datasheet or set of AT commands for SIM800. com RDL Technologies Pvt Ltd 17 SIM800C Code for Sending SMS and Making Voice Call . Use Method. I was using the Arduino to program a ATtiny84 but was getting garbled output or serial was stopping after the 1st line until I reset the Arduino. In this way you can use this module in locations where you have no internet connection and far away from your spot. 5. 8V Peak Current : 2 A – SIM7020X: Design Rule : Vmax = 3. Code Issues Pull requests ☁️ SIM800C GRPS. g. http arduino arduino-library tcp-ip at sim800c. 5sec the SIM800c deploy a signal to SIM_VDD pin (channel-2 - blue line) Now in some boards the SIM_VDD pin goes to 1. SIM800C-DS features GPRS multi-slot class10/class12 This post is intended to help beginners interfacing SIM800 GSM Modem to Arduino. In the attachment you can see how I connectet the modul to Arduino. 1. GSM GPRS SIM800C Module www. 8 TFT Touch Shield with 4MB Flash for Arduino and mbed DFR0343 UHex Low-power Controller The module is powered by a 5V voltage or a lithium battery on the VBAT connector. 3 V! Use a Li-Po battery or a Hi All, I'm having problems with a custom board that I have built with the GSM module SIM800C. Some methods may not work all SimCom Modules like FM Radio methods. The shield supports the frequency of EGSM 900MHz /DCS 1800MHz and GSM850 MHz /PCS 1900MHz, integrated with GPRS, DTMF and other functions. SIM Card: Insert a SIM card into the SIM card holder After your connections are successfully made, insert your sim card inside the module, open Arduino IDE and copy the following code in the editor: For this example we are going to use Software Serial Library. Therefore, a voltage divider should be interposed on the transmission line (TX) from the Arduino, which reduces the voltage from 5 to 3. 3v // SIM80 TXD to ESP32 pin 16 Rx // SIM800 TXD to ESP32 pin 17 tx // AT+CGMI returns the manufacturer's name // Click on a date/time to view the file as it appeared at that time. SIM800C-DS features GPRS multi-slot class10/class12 The Sim800C GPRS/GSM Shield with Antenna provides you with a way to use the GSM phone network to receive data from a remote location,and it is compatible with all boards which have the same form factor (and pinout) as a standard Arduino Board. You can u The SIM800L can be connected to a microcontroller using the serial UART interface, and in the example shown below, connected to an Arduino. I followed the instructions to link it to a site: I'll load the program: #include <SoftwareSerial. To ease the debugging process and also just to minimise surprises, I want to factory reset the SIM800L I'm trying to power an ESP32 and a SIM800L using one 18650 2500mAh battery ( Samsung INR18650-25R) and a TP4056 + MT3608 module. This shield can also be applied to DIY phones for calling, receiving and sen OK guys, just figured out to make this thing work. The Sim800c will provide 2G internet connection to the ESP32. 11. Networking, Protocols, and Devices. The SIM800C GPRS Shield board has a built-in SIM800H chip with good stability. Commented Jan 9, 2018 at 15:28. The SIM800 can be used with an Arduino. com RDL Technologies Pvt Ltd 18 The Internet of Things (IoT) has been a trending field in the world of technology. Specifications: Power SIM800L Pinout Configuration The SIM900 GSM/GPRS shield is designed to surround the SIM900 chip with everything necessary to interface with Arduino, plus a few extra goodies to take advantage of the chip’s unique B) After a short time <1. 1V, Vtyp = 3. Modified 7 years, 3 months ago. Let's start by connecting the SIM800C module with Arduino Uno. When my microcontroller boots up, it keeps the Reset pin of the SIM800L low until it needs to use the module. The SIM800L module has 12 pins in total. Star 2. 3/5V - Compatible. The Sim800C GPRS/GSM Shield with Antenna provides you with a way to use the GSM phone network to receive data from a remote location,and it is compatible with all boards which have the same form factor (and pinout) as a standard Arduino Board. keyestu the ESP32 has hardware serial ports no need to use SoftwareSerial, e. Then upload the test code to make LED flash one by one, achieving light SIM800L and PIC MCU pinout. Serial baud rate self-adaption. Make sure that the two pins labeled as power key are shorted, it is required for the modem to turn ON. I can power it up and get responces to AT commands but it doesn't seem to want to connect to a network (I'm in the UK and have tried the T-mobile sim from my AT+IPR=9600 solved my problems with garbled I/O on one Elecrow GSM/GPRS shield (based on SIMCom SIM800C chip). Learn how to use the SIM800c GSM Module with detailed documentation, including pinouts, usage guides, and example projects. Technical Details: Dimensions: 77mm x 52mm x 27mm. 4V to 4. The old version has been sold out in most of the online store and no produce anymore. Just make sure the voltage of sim800c (or variant) output TTL is 3. 4V, Vmin = 3. This bit of the answer you may enjoy less, although it is good news in that you can figure it out for yourself! You can look up the DATASHEET for the actual module and get a pinout of the module The Arduino Nano unfortunately only has one physical UART port on board. Communication with the Arduino board takes place via a serial channel (serial interface). SIM800C AXP192 20200609: micropython esp32 cellular esp32-arduino esp32-idf Resources. When the Originally this library was developed by Arduino as a "workaround" for mcu with limited USART number. Interfacing GSM SIM800C with STM32F103C8. Install the Arduino IDE. Sponsor Star 1. The Sim800C GPRSGSM Shield with Antenna provides you with a way to use the GSM phone network to receive data from a remote location,and it is compatible with all boards which have the same form factor (and pinout) as a standard Usage Instructions How to Use the Component in a Circuit. 4 V to 4. No packages published . Extract and copy the SIM800C folder to /home/pi of Raspberry Pi; Open Terminal,enter /home/pi/ then execute commands below The first thing you need is a schematic of your board, though they seem hard to find. Pay £40 for an adafruit one and it's all set up for you, or pay £5 for a SIM800 module on it's own and you're in for a world of debug. 3V, because ESP32 only works under 3. SIM800C is a quad-band GSM/GPRS module that works on frequencies GSM850MHz, EGSM900MHz, DCS1800MHz and PCS1900MHz. The module is powered on by toggling the USB /Arduino control switch. 3V, 5V might be over-voltage and burn your chip! *careful! Sim800c, Sim800h & Sim800f library for Arduino, STM, Raspberry Pi, Atmel, Texas Instruments - MythologyTech/Sim800 Learn ESP32 with Arduino IDE eBook » Complete guide to program the ESP32 with Arduino IDE! SMART HOME with Raspberry Pi, ESP32, and ESP8266 » learn how to build a complete home automation system. Arduino Sim800L Notes +5v (3. The Arduino pins 9 and 10 both represent the RX and TX pins needed for data transmission to the SIM800C module. 1V, so driving them straight from the Arduino/PIC is out. The following is the pinout: Keep in mind that the SIM800L chip has an operating voltage range of 3. Stars. And it strikes me that the functions for working with SIM800 take up a lot of space on the first Someone try this device ? I try with no results, i follow tutorials and no results, some secrets to learn first ? Leds apparently blinking ok, but no working, sim tested on a phone for reference: https://wiki. 4v)! Power supply input: RX_PIN: TX: TX_PIN: RX: RESET_PIN: RST A SIM card is inserted at the back of the SIM800C GSM module. we will see how to use SIM800L GSM module with an Arduino. I clear the loop function and insert a new CBC command into it. 2. h> //Create software serial object to communicate with SIM800L SoftwareSerial mySerial(3, 2); //SIM800L Tx & Rx is connected to Arduino #3 & #2 Ahhh those pesky GSM modules. Note that the connections of the RX and TX pins of the Arduino Uno and the SIM800C module are interconnected. 4V) Insert a Mobitel or Hutch SIM card into the SIM800C module. Date/Time Dimensions User Comment; current: 09:28, 11 March 2021: 0 × 0 (185 KB): Waveshare-admin (talk | contribs): 09:00, 26 February 2019 GPS Tracker - DIY - Arduino - Quectel L80 - SIM800: In this instructable, I will show you how to make your very own GPS Tracker. In order to interface SIM800C with STM32F103C8 microcontroller, the UART Serial port will be used which is a hardware serial interface of the STM32F103C8. The SIM800 on the Arduino. The main IC include MT6261M and RF7198. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with Arduino. Hoping for some sound advice. Updated When the position of the switch (middle left in the image below) is set to "extern" (right), you have to supply power to the barrel connector. The module recognizes AT commands, which can be used to do things like check signal strength, get the SIM card number, check the network connection and battery state, in addition to reading texts, making Promake GSM SIM800C Description. It is controlled by the AT command, you can directly start its function through the computer serial port and Arduino motherboard. This GSM/GPRS development board is based on SIM800C chip supporting Bluetooth function and AT command control via the serial port. You have to know I have a The SIM800C pinout includes: VBAT: Power supply input (3. It is controlled by the AT command, you can directly start the function through the computer serial port and Arduino motherboard. Edit: I can see you used 2 Software Serial so you can be The Sim800C GPRS/GSM Shield with Antenna provides you with a way to use the GSM phone network to receive data from a remote location and it is compatible with all boards which have the same form factor (and pinout) as a standard Arduino Board. The SIM800C can be controlled using a set of AT commands. 2 SIM800C Overview . This situation is true if there is a SIM card This library for Arduino to use SimCom GSM Modules. We provide schematics on how to wire the shield to the Arduino, and all the sketches needed to send and receive SMS, as well as to make and receive phone calls. Viewed 3k times 0 \$\begingroup\$ From the data sheet, the maximum input voltage on the digital interface pins is 3. 491 stars. I post my wiring diagram and the code for anyone who wish to use it, as a reference. h> //SIM800 TX is connected to Arduino D8 #define SIM800_TX_PIN 8 //SIM800 RX is connected to Arduino D7 #define SIM800_RX_PIN 7 //Create software serial object to communicate with SIM800 SoftwareSerial Usage Instructions How to Use the Component in a Circuit. Contribute to microrobotics/SIM800C development by creating an account on GitHub. Report repository Releases. Software Setup. 3 volts. PZEM-004T V3. Power is supplied by a 3. KS0003 Keyestudio Proto Shield for Arduino With Mini Breadboard; KS0254 Keyestudio SIM800C Shield for Arduino; KS0255 Keyestudio Bluetooth 4. I have a SIM800C module mounted on a PCB with peripheral circuitry, like this: except the pin adjacent to the 5V pin is labelled EN instead of V_TTL. The SIM800 from SimCom and the Arduino UNO are very popular due to their support from the hobbyist and developer community. Contribute to techiall/SIM800C_Arduino development by creating an account on GitHub. GSM Tx –> Arduino Rx and GSM Rx –> Arduino Tx. Standard Raspberry Pi 40PIN GPIO extension header, supports This circuit interfaces an Arduino Nano with a GPS NEO 6M module and a SIM800c GSM module. 1. To set up the hardware, Insert your sim card and It is controlled by the AT command, you can directly start its function through the computer serial port and Arduino motherboard. Power Supply: Connect a stable power source to the VCC and GND pins. Add a comment | 1 . Updated Apr 16, 2019; C++; sansil / sim800c. 0. Power Supply : 7-12V. To do this, simply switch pin 23 to high in your code. Antenna length: 180mm. Note that the SIM800C doesn’t support 4G, so do not insert a 4G SIM Card. We can use keyestudio Nano ch340 as control board, separately connect 3 LED modules to D4~D6 3Pin interface. GND pin of SIM800L to GND pin of Arduino; TXD pin of SIM800L to RX pin of Arduino; RXD pin of SIM800L to TX pin of Arduino . 6kbps GPRS data rate. For default serial ports RXD(D0) and TXD(D1): call up ***** Wow! that looks like a really nice module! the price though! love the small form factor! I have another GSM shield I bought from maplin here in the UK by a company called Linksprite, SIM900 GPRS/GSM Shield - LinkSprite Playgound this is a SIM900 board though. Perfect for students, hobbyists, and developers CONNECTION SETUP OF GSM MODULE WITH ARDUINO. Serial Communication: Connect the RXD and TXD pins to the corresponding TX and RX pins of your microcontroller or UART interface. No releases published. Summarize SIM800C designed by SIMCom is a quad band module which supports GSM/GPRS. Title: KE0010_KEYES. Then it sets the Reset pin high and waits 8 seconds for all the unsolicited messages to come in "RDY +CFUN=1 SMS Ready Call Ready". It allows your Pi to easily send messages, connect to wireless Internet, transfer data via Bluetooth, and so on. I just want to be able to send messages and do GET commands. The SIM800C can be directly interfaced with the digital pins present on the Arduino Uno. Contributors 6. ☁️ SIM800C GRPS. Footer I have the SIM800C module shown in the attached photo, and I have an Arduino Mega. 6V, Vmin = 2. This shield can also be This GSM/GPRS developemnt board is based on SIM800C chip supporting bluetooth function and AT command control via the serial prot. which is used to communicate between the Arduino and the GSM. This diagram shows that we will connect the UART of the GSM module to the usual pins of the controller, which do not have a physical UART. Readme Activity. 1V and that might let out the magic smoke. Most important part of the module is the Chip made by SIMCom. Some Arduino Sim shields use a hardwate port to power the board off, but thats not on your basic board, so you can either build in such a circuit or use the software control to power it off; see page 24 GPS Tracker Project with ESP8266, NEO-6M, SIM800C, and Arduino Uno This repository contains the documentation and instructions for building a GPS tracker using an ESP8266, NEO-6M GPS module, SIM800C GSM module, and Arduino Uno. The SIM800 modem described in this link has both RS232 and TTL type inputs. Note: The uart pins should be cross connected, ie. I've got it connected to the ATMega through software serial and I am communicating with it fine but I cannot get the SIM card to be detected. Let's Do it Projects Contests Teachers GPS Tracker - DIY - Arduino - Quectel L80 - SIM800. Watchers. The board features an on-board SIM card slot and supports 850/900/1800/1900MHz It is important to switch on the SIM800 first. Power supply requirement: The power supply to the board should be 12v, 1-2A. 0 is the upgraded version to replace the old PZEM004T V1. The module can get AT commands from arduino and execute –SIM800C: Design Rule : Vmax = 4. SIM800C is a Quad-Band GSM/GPRS module, compatible with Arduino and other development boards, with stable performance, small dimensions and compatibility with supply voltages between 5 and 18VDC. DHT11 has two forms: sensor and module. Its operating voltage in which it works fine document and other SIM800C-DS application notes, customer guide, customers can use SIM800C-DS to design various applications quickly. 0 or Version 3. By Pratik Makwana in Circuits Arduino. What I've tried is: SIM800C -> Arduino Mega 5V -> 5V (I've also tried connecting the module to a phone charger, 5V & 2A) V_TTL -> 5V (also . 4V). I have Hello all! I am using an Arduino UNO to communicate with SIM800C(Link to SIM800C: Amazon. Ask Question Asked 7 years, 3 months ago. 7V battery managed by a TP4056 charging module. STM32 provides more UART so I advise to use a real serial using HardwareSerial. 0 DFR0348 3. 43 watching. It operates at a This repository contains code and instructions for testing the SIM800C GSM module using an Arduino. . de : sim 800C gsm). xls Author: MV Created Date: techiall / SIM800C_Arduino. 7mA current in sleep mode. Power up the SIM800L module by connecting a power source of 5V to the VCC pin. SIM800 module comes with different versions like SIM800L & SIM800C. Install the SoftwareSerial library if It is controlled by the AT command, you can directly start its function through the computer serial port and Arduino motherboard. The SIM800C GPRS shield has a built-in SIM800H chip from SIMCom, with good stability. Learn how to program Arduino to read temperature and humidity from DHT11 sensor and module. V_TTL is supposed to select between 3. It is only blinking but not responding to any AT command. This project follows the schematic diagram shown in Figure 1. It also supports DTMF. My problem is simple: I have no idea how to connect it to the Mega. 3 and 5V signal levels Firstly, is the function of the EN pin the same, if not what does it do? Secondly, the PWK pin I understand to be connected to the SIM800C PWRKEY GSM GPRS SIM800C Module Interfacing Arduino UNO and GSM GPRS SIM800C Module . Feature Quad-band 850/900/1800/1900MHz KS0254 Keyestudio SIM800C Shield for Arduino; KS0255 Keyestudio Bluetooth 4. Low power consumption: 0. Moreover, it is always busy when we load a new program into the controller or diagnose it in the port monitor. I'm not having a single issue with sending information to it, it's just receiving information from it. SIM800C features GPRS multi-slot class10/class12 (optional) and supports SIM800C GSM Module 3. 241 forks. Forks. 5,129. GND: Ground connection. On-board SIM card slot and support 850/900/1800/1900MHz quad band can be used There are many different versions of the SIM800c breakout boards, and that means you cannot say for sure whether pinouts are the same with these 2. The board features an on-board SIM card slot and supports 850/900/1800/1900MHz The SIM800C GSM/GPRS HAT is a handy, low power Raspberry Pi HAT which features multi communication functionalities: GSM, GPRS, and Bluetooth, with up to 85. The tracker reads GPS coordinates from the NEO-6M GPS module and sends the data to a server using the SIM800C module. SIM800L HARDWARE. The SIM800C Hey there! I am gonna use a Sim800c Module by an UNO Arduino I have Tried this Module with a hyper terminal application (Putty) using TTL serial and a USB to Serial converter(FT232R USB UART) and everything was fine, but when I am gonna try this module with Arduino UNO, I got a problem. 1V 500mW V BA T Cb 100uF 1uF Ce Cc 100uF Cd Ca 100uF 100nF GND *Note: For SIM800C and SIM7020 compatible design, It is recommended to use a DC SIM800L pinouts / network problem. So I bought one (link below) and it's been a bit of a nightmare. void Good morning to all, I write because I'm literally going crazy, I can not understand why my sim800L does not want to work. I've bought a cheap Chinese SIM800L breakout module as below. I'm using this guide to also include power path sharing so I can charge the SIM800C has Bluetooth functionality. Introduction: GPS Tracker - DIY - Arduino - Quectel L80 - SIM800 This tutorial is about sending a SMS using a SIM800 GSM module with an Arduino. The Sim800C GPRS/GSM Shield with Antenna provides you with a way to use the GSM phone network to receive data from a remote location and it is compatible with all boards which have the same form factor (and pinout) as a standard Arduino Board. SIM800C Description 1. I remove the SIM800read I connect the Arduino to the laptop with a USB cable and open the Arduino IDE program. The baseband circuit is based on MTK and RF circuit is based on RFMD. SIM800L GSM Module Pinout. You can do reset, but in my case it didn't help: on powered SIM800L module shortcut "RST" pin with the ground for half of second - unit should reset and restart. Learn Raspberry Pi Pico/Pico W with MicroPython » The complete getting started guide to get the most out of the the Raspberry Pi Pico/Pico W Hi Friends Need Huge Help!! im using below code for send sms via sim800 module and my requirement is to send two SMS to two different numbers with different sms commands! For example:- My 1st Number is 0711034141 need to send sms as "Prime" My 2nd Number is 0706304141 need to send sms as "Coil" The Code that i needed modifying below!! SIM800C GSM Module 3. Hope it helps :) This is widely happen problem - serial communication with SIM800L stopped working. Connect the Tx and Rx pins of arduino pins to Rx and Tx pins of GSM Modem. 0 and this version of the SIM900, I found the SIM900 document and other SIM800C-DS application notes, customer guide, customers can use SIM800C-DS to design various applications quickly. Download demo codes from wiki page. 4 V, so connecting this module to the Arduino’s 5V output is probably going to cause damage to the module. LED indicator for power supply status, network status and operating mode. 2V to 4. try this // // SIM800L EVB ESP32 test using Serial2 (pins 16 Rx and 17 Tx) // connect so // SIM800 5V to ESP32 5V // SIM800 GND to ESP32 GND // SIM800 VDD to ESP32 3. The nodes will be executing a HTTPS request and via this device (Master) the http request will gets executed and the response will be received via the Master device and again forwarded to the Node. This Arduino sketch interfaces with the SIM800C module using the SoftwareSerial library. This library tested on Sim800L (5V Module). MrCanBus June 13, 2015, 2:21pm 1. It is built with Quad Band GSM/GPRS engine – SIM800C, that works on 850/900/1800/1900 MHz frequencies. When you set the switch to the left position, the module takes power from the 5V pin of the arduino OR (dont attach both!) an external power supply you attach to that pin. SIM800C TX to Arduino pin 5; SIM800C GND to Arduino GND; SIM800C VCC to a suitable power source (usually 4. 8v)~(4. SIM Card: Insert a SIM card into the SIM card holder In order to ensure that SIM800C GSM/GPRS HAT can work properly after it is connected to raspberry pi, it is necessary to initialize the level output of raspberry pi board pin. Between the SIM800L, SIM800L EVB v2. Here is a sketch from the previous video. qdoa vdrcdy vmu ixtqxj whbllv cagm nwy qajsz jgjx iflfoyj