The WiFi module ESP-1 is manufactured by using a high-performance chip ESP8285.
This small chip is encapsulated an enhanced Tensilica’s L106 series 32-bit kernel CPU with a SRAM.
Thus, ESP8285 has the complete function Wi-Fi function; it not can be applied independent but can be used
as a slaver working with other host CPU. When ESP8285 is applied as a slave, it can start from the onboard Flash.
The built-in high-speed buffer is not benefiting improve the system performance but optimizing the store system. In addition, ESP8285 can be used as Wi-Fi adapter by SPI/SDIO or I2C/UART interface, when it is applied to other MCU design.
More details, please visit this GitHub link to get the manual and tools, https://github.com/SmartArduino/SZDOITWiKi/wiki/ESP8285---ESP-1
Support serial to WiFi;
Wireless transparent transmission;
Long distance transmission with ultra-low power;
Support outboard antenna;
Bearing high temperature to 125 ℃, compared to the 85℃ for ESP8266.
Working temperature: -40℃-125℃
Built-in Tensilica L106 ultra-low power consumption 32-bit CPU, the main frequency can be
80MHz and 160MHz, also support RTOS;
Built-in TCP/IP protocol stack;
Built-in 1 channel 10-bit high precision ADC;
The outside interfaces have HSPI, UART, I2C, I2S, IR Remote Control, PWM, GPIO;
The deep-sleep current is about 10uA, and the cut-off current is smaller than 5uA;
Can be wake-up within 2 ms, and connect to transmit data package;
the consumer power is smaller than 1.0mW (DTIM3) when at standby status;
built-in 1M byte for SPI Flash.