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About Cactus Micro R2 recently

The default firmware for esp8266 is espduino not AT firmware. The espduino firmware is easier to use for REST http request. Some examples and tutorials available here.

If you'd like use previous AT firmware, you can re-flash the firmware yourself.

• The AT firmware
• How to made Cactus Micro R2 as ESP8266 programmer

Please discuss at our support forum about the topic.