SMS gateway with 2 A6 modules (ESP8266-12 with 2 A6 GSM modules)

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STD SMS gateway with 2 A6 modules (ESP8266-12 with 2 A6 GSM modules)

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Update time： 2021-04-09 19:17:33

Creation time： 2017-05-19 06:34:07

Description

The idea behind this project was the need to create very simple SMS to web gateway that works with more than one MNO. The code is based on [A6lib by Stavros Korokithakis][1] . The board can be used for general purpose development of ESP8266. All free GPIOs are exposed on connectors. It can be powered directly from the power line or through USB. I'll publish the code next week :) [1]: https://github.com/skorokithakis/A6lib

Design Drawing

schematic diagram

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SMS gateway
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PCB

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SMS gateway
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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	GSM A6 Mini Module	U1,U2	GSM A6 Mini	2
2	PFETBS250	Q1,Q2	TO92-OVAL	2
3	ESP07-16PIN	U3	ESP07	1
4	HLK-PM01 - AC-DC-converter	U4	HLK-PM01	1
5	MCP1825S-3302E/AB	U5	TO-220(TO-220-3)	1
6	4.7u	C1	CAP-D3.0XF1.5	1
7	1u	C2	CAP-D3.0XF1.5	1
8	1u	C3,C4	RAD-0.3	2
9	10k	R1,R2,R3,R4,R5,R8,R9	AXIAL-0.3	7
10	CH5.08-3A	P1	CH5.08-3A	1
11	330	R6,R7	AXIAL-0.3	2
12	TX/RX/ADC	TX/RX/ADC	HDR-4X2/2.54	1
13	I2C	I1C-2	HDR-4X2/2.54	1
14	100uF	C5	CAP-D5.0XF2.0	1
15	Power	P2	HDR-4X2/2.54	1
16	MICRO USB 5S B	USB1	MICRO-USB-1	1
17	FLASH	PGM	Button 3.5 x 6.0	1
18	204-10UYC/S530-A3	LED1	LED-3MM/2.54	1