ESP-M4 is encapsulated by the high performance chip ESP8285, which is adequate to ESP8266 chip plus 1M Flash. The chip ESP825 is encapsulated an advanced Tensilica’s L106 32-bit CPU, alongside SRAM. ESP825 has the complete and complete WiFi function, which may used independently and alsoused as a slaver with other Hoster MCU, which may start directly from the out-built Flash. In addition, the built-in high-speed buffer is benefit for the system performance. Especially, ESP8285 are often used as a WiFi adapter by SPI/SDIO and/or I2C/UART interface, when it's applied to the opposite MCU design.
Features: Ultra-small size, Support serial to WiFi, Wireless transparent transmission, Long-distance transmission with ultra-low power, Support outboard antenna. Bearing high temperature to 125oC, compared to the 85oC for ESP8266.
ESP8285=ESP8266+1M Flash, chip feature1) size is ultra-small2) serial to WiFi3) wireless transmission4) long-range ultra-low-power consumption5) high temperature, up to 125oC) fully compatible with ESP8266, the esp8266 source code can be used for esp8285
SOC Features:
Built-in Tensilica L106 ultra-low power 32-bit microprocessor, clocked at 80MHz and 160MHz support RTOS
Built-in TCP / IP protocol stack, Built-in 1 channel 10 bit precision ADC. Peripheral Interface HSPI, UART, I2C, I2S, IR remote, PWM, GPIO. The deep sleep hold current is 10uA and therefore the shutdown current is a smaller amount than 5uA, awaken within 2 ms, connect and pass the packet, Standby power consumption less than 1.0mW (DTIM3)
Wi-Fi features:
Supports 802.11 b / g / n / e / i, Support Station, SoftAP, SoftAP + STA mode, Support for Wi-Fi Direct (P2P), Supports CCMP (CBC-MAC, counter mode), TKIP (MIC, RC4), WAPI (SMS4), WEP, (RC4), CRC hardware acceleration, P2P discovery, P2P GO mode / GC mode and P2P power management. WPA / PA2 PSK and WPS, 802.11 i security features: pre-authentication and TSN, Supports 802.11n (2.4 GHz), 802.1h / RFC1042 frame encapsulation. Seamless roaming support, Support AT remote upgrade and cloud OTA upgrade, Support for Smart Config features (including Android and iOS devices).
The main technical parameters of the module are as follows:
Wi-Fi
- 802.11b: +20 dBm
- 802.11n: +14 dBm
- 802.11b: -91 dbm (11Mbps)
- 802.11n: -72 dbm (MCS7)
Hardware
- Wi-Fi mode: Station/SoftAP/SoftAP+Station
- Security Mechanism: WPA/WPA2
- Encryption type: WEP/TKIP/AES
- Upgrade firmware: UART Download/OTA (via network)
Software
- Software development: Non-RTOS/RTOS/Arduino IDE, etc.
- Network protocol: IPv4, TCP/UDP/HTTP/FTP/MQTT
- User configuration: AT+ instruction set / cloud server / androids / ioses APP
Product Details:
| Model Name/Number | ESP 8285 M4 |
| Brand | DOIT |
| Operating Temperature | -40 DegreeC ~ 125 DegreeC |
| Frequency Range | 2.4G~2.5G (2400M~2483.5M) |
| Transmit power | 802.11g +17 dBm |
| Receiving sensitivity | 802.11g -75 dbm (54Mbps) |
| Antenna | PCB onboard antenna |
| CPU | Tensilica L106 32 bit microcontroller |
| Peripheral | UART/SDIO/SPI/I2C/I2S/IR remote control GPIO/ADC/PWM/SPI/I2C/I2S |
| Operating Voltage | 2.5V ~ 3.6V |
| Working current Average current | 80 mA |
| Ambient temperature range | -40 DegreeC ~ 125 DegreeC |
