Happy International Labor Holiday,Elecrow will be on holiday from May 1st to 4th.You may still place orders of products and manufacturing services as usual, and we will resume production and shipping on May 5th.
The free item I would like to recommend today is SIM808 GPRS/GSM+GPS+Bluetooth Shield . This is one of hottest products on our site. Except for popular ESP8266, SIM808 can be also used in IoT projects. One of Elecrow engineer did a remote control project based on SIM900, the old version of SIM808. The Remote Control Via GPRS/GSM tutorial is completely recorded on Elecrow instructables channel.
We're excited to see what you will create with SIM808. (Send the link of your project to sponsorship@elecrow.com to get a refund)