Wee (ESP8266) Start Guide: AT Commands Test

Adopted a standard XBee interface, Wee WiFi module pinouts ESP8266 Soc to provide a full IOs using for hacking. This tutorial is a start guide for testing AT commands on Wee WiFi module.



Serial Port Debugging Software: sscom42.exe (Chinese Version)

You can click it to download the software, please note that this software can be opened unless it detects a serial port.

Get started to know this software

Continue reading

Tips and Ticks for AC-DC Module Layout

Recently, our new hardware engineer Li Yun studies IWATT’s AC-DC solution. He finds out that the basic theories of all solutions are the same, and the different performance due to using different electronic components. Among all the AC-DC solutions, there are two important signals that control the performance of output – ISENSE and VSENSE signals. ISENSE shall be placed near the switch in order to avoid the signal interference, meanwhile, pins shall be placed near the ISENSE. To improve the quality of feedback signals, VSENSE shall be placed near the transformer. Except that, all bypass capacitors shall be placed near their own pins to improve the performance of transmission.

To reduce the EMI, the switch loop circuit must be minimized. The main loop circuits include:

  1. First loop circuit comprises large input capacitor, primary winding, switch, and RISENSE.
  2. Second loop circuit comprises output diode, output capacitor, and secondary winding.
  3. Third loop circuit comprises assist winding, rectifier diode, and VCC.

Continue reading

IoTgo Arudino Library Preview

ITEADLIB_Arduino_IoTgo is an Arduino library specially written for IoTgo platform. It supports ESP8266, W5100/W5500, and SIM900/908 modules accessing and communicating to IoTgo platform through WIFI, GPRS, or Ethernet.

In previous two blogs, we've demonstrated how to remote monitor temperature and humidity and how to remote control a switch. In the part of codes using, we use the demos directly provided by IoTgo library, and the rest we need to do is to modify the API Key and Device ID. In this blog, we will take a further step to learn how to use this Arduino library.

Besides, this library supports three network connection modes including Ethernet, GPRS and WIFI(esp8266). Users can modify the connection mode by defining different macros in the configuration file IoTgo_config.h

#define NET_USE_ESP8266
//#define NET_USE_W5X00 
//#define NET_USE_GSM

Continue reading

Second Batch Airspy Shipping Delay (Update)

Dear all Airspy fans,

We are sorry to inform you that the second batch Airspy shipping will be delayed. 

The aluminum enclosure should have been arrived on Friday this week. However, the cooperated factory tells us that the aluminum enclosure only can be delivery on Friday next week because the end of the year is the peak season of their goods producing and shipping.

For the part of boards producing, the SMD can be finished in this week and we will test them from the Monday next week.

We are sorry for the shipping delay. When they are ready, we will ship them to you ASAP. 

Update on 12/19/2014

For now, we still haven't recieved the alumium enclosure. The process of alumium enclosure producing divides into three steps: cutting, oxidation, and silkcreen. Now they are in silkcreen process, and it is expected that the silkscreen can be finished on Wednesday next week. 

We can't tell a exact shipping day before we recieve the alumium enclosure. But we hope that they will be shipped before new year.

Keep track of this blog, we will update the latest airspy shipping information here.

Update on 12/26/2014

Hey guys, how is your Christmas going? The good news is that airspy alniumum enclosures have been shipped from the factory! Once we got them, we will pack them with airspy and send them to you asap! stay tuned! 

Update on 12/29/2014

Alniumum enclosures arrive today! We start to assemble the Airspy boards with the cases.

BTW, we get a feedback about Airspy USB connector problem in yahoo group. 


To solve this problem, we remove the outside casing part and scrape the non-conducting layer "blank paint" off the casing where the SMA connector hole is.

Update on 12/31/2014

We start to ship the second batch Airspy today. They will be shipped in 2-3 days. During this time, please login to your ITEAD account in imall to keep track of your order status. 

Update on 1/2/2015

Happy new year! The second batch airspy shipping is finished in today. Please login to your ITEAD account in imall to check your tracking number. 

Wboard Pro Applies in IoTgo Platform (2): Remote Control Home Application

For now, IoTgo platform only supports three devices: temperature and humidity sensor, light and switch. And it only provides some basic operations for these devices. In the future, we will devote to develop this platform to support more devices and provide more operations.

In this tutorial, we use Wboard Pro again. When the Wboard Pro connects a 2 Channels 5V Relay Module and a local button brick to communicate with IoTgo platform, we can make a remote switch so that we can control a home application from office or anywhere.

Hardware Connection

The relay module connects to Wboard Pro's Dx pin. and the local buttom brick connects to Wboard Pro's interrupt pin. Then you need to connect the power lines of certain home application to the switch pins of relay. By doing so, we can control this home application via Dx pin. We will use a ventilator to do the demonstration in this tutorial.
Please refer to the following pictures.

Continue reading

Wboard Pro Applies in IoTgo Platform (1): a Remote Temperature and Humidity Monitor

In this tutorial, we use Wboard Pro and SHT10 temperature and humidity sensor as example to communicate with IoTgo platform so that we can realize a remote temperature and humidity sensor that can be visited via internet.

For the Hardware part, we choose the Arduino development board Wboard Pro with an on-board wifi ESP8266 chip, and then make the SHT10 sensor brick connect to it. You can connect SHT10 sensor to Wboard Pro's IIC. Please refer to the following picture.

Continue reading