Description
comparing to ESP-01 (old version), ESP-01S (updated version) has these advantages:
- The PCB layout has changed for an improvement in WiFi radio performance
- 1MB Flash Memory…upgraded from 512KB
- Latest version esp-01s, with stronger signal
Feature
- SDIO 2.0, SPI, UART
- Four pins interface, VCC-3V3, GND, TXD and RXD. Two extra GPIOs can use.
- AT commands firmware. New IC ESP8266ex
- Wi-Fi Direct (P2P), soft-AP
- Integrated TCP/IP protocol stack
- Integrated TR switch, balun, LNA, power amplifier and matching network
- Integrated PLLs, regulators, DCXO and power management units
- +19.5dBm output power in 802.11b mode
- Power down leakage current of <10uA
- Integrated low power 32-bit CPU could be used as application processor
- SDIO 1.1/2.0, SPI, UART
- STBC, 1×1 MIMO, 2×1 MIMO
- A-MPDU & A-MSDU aggregation & 0.4ms guard interval
- Integrated RF switch, balun, 24dBm PA, DCXO, and PMU
- Integrated RISC processor, on-chip memory and external memory interfaces
- Integrated MAC/baseband processors
- Quality of Service management
- I2S interface for high fidelity audio applications
- On-chip low-dropout linear regulators for all internal supplies
- Proprietary spurious-free clock generation architecture
- Integrated WEP, TKIP, AES, and WAPI engines
Specification:
- 802.11 b/g/n
- Wake up and transmit packets in < 2ms
- Standby power consumption of < 1.0mW (DTIM3)
