Introduction of OSOYOO MEGA-IoT Shield

OSOYOO MEGA-IoT shield is based on Arduino shield which integrates famous ESP8266 WiFi Chip and provides low-cost WiFi solution for Arduino MEGA2560 projects.

OSOYOO MEGA-IoT Shield is a plug and play shield which is very convenient for  beginners.   No additional soldering or wiring needed, just stack the shield on to OSOYOO Advanced Board for Mega2560 Board(Fully compatible with Arduino Mega2560), select the pins for serial communication with mini jumpers and the hardware connection is completed!

The ESP12S comes pre-flashed with an AT-command firmware, so it can be controlled by any UART/Serial, but it also breaks out and provides command access to all of the ESP8266’s I/O. The shield itself does not limit to AT command, we have breakout most of the IO and you can program the ESP12S module directly. Whether you want to add AT commands of your own, or flash custom firmware on the ESP8266, this feature may come in handy especially with it utilizing the UART pin selectors.

1. ESP8266 debug port , these 4 pins can be used to flash ESP8266 firmware or debug AT command through Serial Port.
2. ESP WIFI selector :  if jumper caps connect to left side, ESP connect to software serial(A8,A9), if caps are on the right, ESP8266 connect to MEGA2560 Hardware Serial1.
3. Connect to HC-02 (or HC-05,HC-10) Bluetooth Module
4. XH2.54 Digit module slots to connect OSOYOO modules
5. XH2.54 Analog module sots to connect OSOYOO analog modules
6. Connect to OSOYOO Ultrasonic Sensor module
7. Xh2.54 4 pin slot to connect I2C device .i.e OSOYOO I2C LCD, PCA9685 etc
8. Connect to OSOYOO RGB module
9. Connect to OSOYOO 4*4 Keypad
10. Power indicate LED
11. Connect to OSOYOO RFID module
12. Reset button
13. LED (D13)
14. ESP8266 Reset button (to flash firmware)
15. ESP8266 Key button (to flash firmware)
16. Build-in 5V-3.3V level converter
17. Bluetooth Serial selector :  if jumper caps connect to left side, ESP connect to software serial, (A8,A9), if caps in right, ESP8266 connect to MEGA2560 Hardware Serial1

• Notes:

• The standard pin interface ensures full compatibility with the pitch of standard-size boards like Arduino Uno and Mega, but not smaller boards such as Nano and Mini.
• 3.3V power supply using advanced chip (with the official expansion board power chip ESP12S same), so 3.3V OSOYOO board for  Arduino provided more accurate, so ESP8266 as official chip work as normal, there is no difference.
• It leads to a WiFi module power supply / service interface to facilitate developers to extend the power supply and maintenance.
• Onboard ESP8266-12 stable industrial grade serial WiFi module, using an enhanced PCB antenna, signal better.
• You can quickly switch the DIP switch on the ESP8266-12 industrial grade WiFi module to the stable operation mode (such as operating mode and upgrade mode), which integrates a serial chip for quickly flashing the firmware
• Built-in 5V to 3.3V TTL level converter to prevent high-pressure  TTL level of the WiFi module damage.
• Onboard ESP8266-12 stable industrial grade WiFi module with a metal shield, immunity to interference.
• Onboard ESP8266-12 standard pitch leads to a stable industrial grade WiFi module all interfaces, enabling developers to easily develop deep.
• Use stackable design, it can continue to accumulate above the other modules, easy to use.
• Onboard four LED displays the status of ESP8266, namely PWR, L, STA

Eingangsspannung: +5VDC Interne Quelle+7V bis 9VDC[Externe Quelle)
ESP8266 Modul-Versorgung: +3.3VDC

ESP Shield Standard Baudrateneinstellungen sind 9600 kbps Baudrate, 8 Bit Daten, 1 Stopbit und keine Parität

Integriertes ESP12S WiFi-Modul mit vorinstallierter AT-Firmware
Jumper für Software oder Hardware UART und PC-ESP Kommunikation.

Stapelbarer Digital-I/O-Header: Dieser Header-Pin ist ein Digital-I/O-Pin, der auf das OSOYOO Advanced Board für das MEGA2560 Board gestapelt wird. Andere Abschirmungen können auf diese stapelbare Stiftleiste gestapelt werden.

Stapelbare Analog-Eingangsstiftleiste: Dieser Header-Pin ist ein Analog-Input-Pin, der auf die OSOYOO MEGA2560-Platine gestapelt wird. Andere Abschirmungen können auf diese stapelbare Stiftleiste aufgesetzt werden.

Serieller Selektor: Der Benutzer kann mit den Mini-Jumpern A8 als RX-Pin und A9 als TX-Pin der OSOYOO MEGA2560-Platine auswählen.