Geeetech ESP8266 Bedienungsanleitung

WiFi Module Instruction

Contents

1. Overview...................................................................................................................................1

1.1 Product Name: ESP8266 WiFi Module ............................................................................1

1.2 Main Features....................................................................................................................1

1.3 The Structure of ESP8266 WiFi Module ..........................................................................1

1.4 Applications ......................................................................................................................2

1.5 Operating Environment.....................................................................................................3

1.6 Operating requirements.....................................................................................................3

2. How to use ESP8266 WiFi Module ..........................................................................................3

2.1 Define the Interface between ESP8266 WiFi Module and 3D Printer’s Control Board ...3

2.2 Define the Interactive Interface between ESP8266 WiFi module and the Server.............7

2.3 Define the Interactive Interface between ESP8266 WiFi Module and the mobile (Config.

mode) ........................................................................................................................................8

2.4 The Interface between Database and the Console.............................................................9

2.5 Define the Interface for Uploading Files.........................................................................10

1. Overview

1.1 Product Name: WIFI module

Trade Mark:

Model No.:ESP8266

1.2 Main Features

ESP8266 is an integrated and systematic solution to WiFi network. Users can use

mobile devices as the station to connect to softAP port of ESP8266 so as to control it

by via router network connectivity. It is easy to add ESP8266 to any

microcontroller-based design via the UART port and upload and download data to the

cloud server. Via the cloud, users could utilize mobile devices to monitor the working

status of the microcontroller and send instructions to it.

ESP8266 WiFi module works as the network interface between 3D printer and

mobile devices. This WiFi module, adhering to the 802.11 network protocol, supports

the communication between 3D printer and the Geeetech self-developed 3D printing

App --- EasyPrint 3D. In addition, other network endpoints based on the 802.11

network protocol could be compatible with this WiFi module.

1.3 The Structure of ESP8266 WiFi Module

Figure 1. Functional Block Diagram

ESP8266 WiFi module comes with a built-in Tensilica L106, 32 bit

microcontroller, having ultra-low power 16 bit RSIC. The speed of CPU clock is at

Note:The manual will be released after granted the FCC authorization.

80MHZ, with its upper limit as 160MHZ. ESP8266 uses the external SPI Flash to

store user program, with the memory of 1MB. Based on an external crystal, the

crystal oscillator of ESP8266 could generate Radio Frequency clock to drive the

mixer to down-convert the radio frequency signal and transform it as digital signal.

The orthogonal baseband signal would be up-scaled to 2.4GHz. ESP8266 supports

TCP/IP protocol, 802.11 b/g/n/e/I WLAN MAC protocol and the Wi-Fi Direct

standard. The two universal asynchronous receiver transmitters of the hardware could

communicate with the microcontroller in a convenient way.

Figure 2. Interface Definition

The pin assignments as shown in Figure 1-1

Name

Type

Function

GND

Ground wire

CHIP_EN

I/O

Chip Enable Terminal:The chip works normally at

the high level, and closes at the low level with

low current 。

RST

I/O

External reset signal （works normally at low level）

RXD

I/O

The RX pin of UART，the TX pin of external circuit

TXD

I/O

The TX pin of UART，theRX pin of external circuit

GPIO0

I/O

FLASH start at the high level; System upgrade at the low

level (able to upgrade internal firmware via the serial

port)

GPIO2

I/O

3.3V

Digital power supply 3.3V

1.4 Applications

ESP 8266 WiFi module can be apply to different fields, such as 3D printer,

domestic appliances, home automation, smart socket and lamp, industrial wireless

control system, sensor networks, wearables, wireless position sensing devices, etc.

1.5 Operating Environment

1.6 Operating requirements

a. Stable voltage for the power supply module

b. The upper limit voltage for GPIO is 3.6V. In case that the voltage goes beyond

3.6V, you need the buck circuit to drive ESP8266 WiFi module. Or there

would be damages for the GPIO interface.

c. If you choose to use LDO to transform the voltage, make surethat the input

and output voltages are large enough. The decoupling capacitor should be

place beside the module and the equivalent resistance should be low enough.

When using DC-DC to power up the module, please, if necessary, add the LC

filter circuit.

d. Since the RF of ESP8266 WiFi module and the digital circuit are of high

integrity, and high-level current is needed for FR self-calibration when the

power is on, please ensure that the current could reach 5000 Ma to avoid

instantaneous voltage drop.

e. We don’t recommend you to use un-calibrated battery to power up the module,

since the FR circuit would be affected by temperature and voltage fluctuation.

2. How to use ESP8266 WiFi Module

2.1 Define the Interface between ESP8266 WiFi Module and 3D

Printer’s Control Board

Connect the Server

Instruction

format

Connect to srd;devicename;serverIP;

Description

Inform the WiFi module of the user name and password, the router’s name and the

IP address of the server.

Need to reset the WiFi module before sending this instruction.

Log on to the Server

Instruction

Format

deviceord;login\r\n

Description

Inform the WiFi module to log in with the user name and password

Enter the Configuration Mode

Instruction

format

set ap\r\n

Instruction

format

get name ssid:password; serverIP;\r\n

Data Transmission

ESP8266 WiFi module adopts the transparent pass-through approach to transmit

data. However, the transmission speed of WiFi module is limited. So the data

packages could only be transmitted one by one.

Transmit one data package:

Instruction

format

xxxxxxxx\n

Description

Xxxxxxxx as the content; “\n”as the end signal. WiFi module regards xxxxxx as one

data package.

The Network Disconnection Situation

When the network is disconnected (in case of weak WiFi signal or abnormal

logout), WiFi module will send one instruction to the control board every 3 seconds.

The instruction is as follows:

Instruction

format

Description

When the network is disconnected, WiFi module will send one instruction to the

control board every 3 seconds. Meanwhile, the control board should restart the

WiFi module.

Send the reconnection command, if necessary.

Complete the gcode. Instruction

1) M20 reads SD card file list.

2) Print the select SD card gcode file.

3) Send gcode file to SD card.

Inquire temp

M105

ok B:16.8 /0.0 T0:17.5 /0.0 T1:0.0 /0.0 T2:0.0 /0.0

F0:200 S:100 @:0 B@:0.

Home X axis

N79 G28 X0*101

X:280.000.ok

Home Y axis

N80 G28 Y0*98

Y:160.000.ok

Home Z axis

N81 G28 Z0*96

Z:157.000.ok

Home all the

axes

N82 G28*41

X:280.000.Y:160.000.Z:157.000.ok

Move X axis

by -1mm

N86 G91*47

N87 G1 X-1 F4800*25

N88 G90*32

Move X axis

by 1mm

N101 G91*17

N102 G1 X1 F4800*8

N103 G90*18

Move Y axis

by -1mm

N110 G91*17

N111 G1 Y-1 F4800*38

N112 G90*18

Move Z axis

by -1mm

N113 G91*18

N114 G1 Z-1 F100*29

N115 G90*21

.N116 G91*23

N117 G1 E-10 F1800*9

Move the

extruder by

-10mm

N118 G90*24

Set printing

speed as

141%

N119 M220 S141*109

Set fan speed

as 230

（0~255）

N180 M106 S230*111

Switch off

the fan

N181 M107*45

Set hotbed

temp as 55℃

N182 M140 S55*94

Set the temp

of T0

(Extruder 1)

as 200℃

N184 M104 T0 S200*46

Inquire

device info

N11 M115*22

FIRMWARE_NAME:V1.08 PROTOCOL_VERSION:V1.0

MACHINE_TYPE:D200 EXTRUDER_COUNT:2

UUID:16S1123D2000010.

Switch off/

Enter the idle

mode

N15 M81*46

Switch on/

Wake up

N15 M80*46

Delete SD

card file

N15 M30*46

List SD card

N15 M20*46

Return to the file list, ok

Return a “end”command as “list end”

Select file

and start SD

N15 M23 foot.gcode(file name) *46

Start/resume

SD print

N15 M24*46

Pause SD

N15 M25*46

Disable

motor

Enable

Motor

Inquire the

status of 3D

printer

M21

printer_priile:xxxx.gcode;precent:60%;used_time:20mm;

printer_pae:xxxx.gcode;precent:60%;used_time:20mm;

printer_idle;

Notifications

upon

finishing

printing

printer_fi:xxx.gcode;used_time:60mm;

Notifications

when

filament runs

out

printer_ lament;

Event: finish printing, pause, filament running out/ fracturing, 3D printer is

on-line, 3D printer is off-line; printing, etc.

2.2 Define the Interactive Interface between ESP8266 WiFi

module and the Server

Log in

Instruction

format

yy_xxx:nnnn;login

Description

User name: password

Users connect the 3D printer with the server

Instruction

format

xxx;call;yyy

Description

User xxx visits 3D printer yyy: Inform the WiFi module of 3D printer that the data

returned will be transferred to user xxx.

Inquire on-line devices

Instruction

format

xxx;get live

Description

Xxx represents that the user is inquiring which 3D printers are online.

Data transmission

Instruction

format

xxx;senddata;yyy;nnnnnnnn

Description

xxx，yyy represents the users of mobile App or 3D printer (WiFi module).Xxx sends

data “nnnnnn”to yyy. The server will transfer the data to yyy.

User traverses all the files on the server

Users, based on the path, visit the corresponding file in the same way as http URL,

for instance, images.

Instruction

format

xxx; server browse;

Description

User xxx requests to traverse all the files of the given path on the server.

eg.

get browse;./3D/gcode

Return

+./3D/gcode

- ./3D/gcode /body.gcode

-./3D/gcode /body.jpg

+ ./3D/gcode/image

-./3D/gcode/image/test.jpg

(+ refers to the folder, —the files)

Upload a given file from the server to the 3D printer

Instruction

format

xxx; server send file;filename

Description

User xxx requests to send the file, whose path and name are “filename”to user yyy

(3D printer)

Regular report to the mobile App about the uploading progress

Instruction

format

server send file progress;yyy;10%;filename

Description

2.3 Define the Interactive Interface between ESP8266 WiFi

Module and the mobile (Config. mode)

Configure SSID, password, IP address

Instruction

format

http://192.168.4.1:80/ssid:zzz;password:yyyy;server:xxx.xxx.xxx.xxx

Description

To simplify the encoding job of html5, the data is placed after URL to send to

WiFi module.

2.4 The Interface between Database and the Console

The database adopts Sqitle3.

Define the user format in the database

Format

user ( password TEXT,friend0 TEXT)

Description

1）user is a form name in the database. In each line of the form, there are 2

character strings: password, friend0. “Password”consists of “user name:

password”. “Friend 0”represents good friend.

2）The “printer_”before user name represents the printer’s login name.

Administrator

Administrator is defined according to the user format.

Administrator obtains the detailed user info list

Format

user form

Description

To obtain the detailed user info list, administrator needs to log in at first.

eg.

user form

Return

Format

User word: friend\n

eg.

Administrator adds user name and password

Format

name: word : friend

Description

Administrator adds user name and password

Return

Administrator deletes user name and password

Format

User name

Description

Administrator deletes user name and password

eg.

user printer_123456

Return

Success or fail

Users change passwords

Format

Old passwoassword

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