Please note: Maybe there are some modules without ESP-01S logo like pictures show, it didn''t affect the function. And some of this ESP01S modules are PUYA chips. Maybe there are some different between the new one and old one in the aspect of usage. Pls have an attention to this.
Latest version esp-01s,comparing to ESP-01, ESP-01S will provide you stronger antenna singna
1MB Flash Memory. upgraded from 512KB，Integrated WEP, TKIP, AES, and WAPI engines. 802.11 b/g/n
Wake up and transmit packets in 2ms. Standby power consumption of 1.0mW (DTIM3)
Document link: https://nurdspace.nl/ESP8266

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 2.8 inch
Height : 1.1 inch
Length : 4 inch

Item Weight: 0.16 ounce (View shipping rates and policies)
Shipping Weight: 0.64 ounce (View shipping rates and policies)

ASIN : B01N98BTRH