EC-01F-Kitis an NB-IoT development board developed by Ai-Thinker. The main chip scheme used in the NB-IoT part is EC616S. The ultra-integrated NB-IoT SoC development board supports ultra-low power consumption and fully supports the 3GPP Rel14 NB-IoT standard, making it an ultra-cost-effective NB-IoT chip.
It has the following characteristics (NB-IoT):

Are integrated with RF transceivers, PA, RF filters, antenna switches, and power management.
Excellent communication performance and stability in a variety of wireless environments.
Excellent power performance in various modes (PSM, DRX, eDRX, connected mode).
Unique MCU mode, providing lower operating current and shorter wake up time.

Features:

Processor:

Cortex-M3,Support MPU
Configurable CPU frequency,Max 204MHz
8-Channel DMA

Memory:

4MB NOR Flash on chip
272KB WIW SRAM,divided into 256KB and 16KB
16KB instruct cache

System:

Flexible Configuration Support 1.8/2.8/3.3V IO
Clock source: 26MHz TCXO or DCXO, 32.768khz crystal oscillator
1 external wake up source (interrupt)
Unique MCU mode, in this mode, internal RC oscillator as the clock, lower power consumption
LOG,UNILOG
Debug port,SWD

Peripheral:

8 GPIO(Include TX0\RX0 AND TX1\RX1)
2 UART,2 I2C
5 PWM
4 Channel12-bit AUXADC
1 SIM Booth

Low power consumption:

Unique low power architecture, level 4 sleep mode
PSM: 800nA
DRX (2.56s): typical value 110uA
RX: typical value 10mA
TX: typical value 24mA

Communication:

Fully support 3GPP R14 NB-IoT
Category NB2, 2-HARQ
Multi-tone NPUSCH
Anchor and non-anchor carrier
In-band same/different PCI, guardband, standalone
Multi-carrier paging, NPRACH
Positioning: OTDOA & ECID
ROHC, RAI, multiple-DRB, RRC connection re-establish
SC-PTM (need SW upgrade)

Radio frequency:

Support the spectrum: Band3, Band5, Band8
Chip integrates PA and supports APT function
Chip integrated RF transceiver filter and antenna switch
Power level 3

Safety:

Hardware Encryption and decryption module (AES, SHA)Secure boot
Flash encryption
True random number generator

Application:

Support Open-CPU
software conforms to the CMSIS architecture
Supports mainstream cloud services
IPv4, IPv6 and non-IP
UDP, TCP
DTLS, TLS, SSL
MQTT, CoAP, HTTP(S)
LWM2M
Support FOTA

Power supply voltage:

Support 5V Micro USB or 3.3V pin supply

Specifications:

Development Board Model: EC-01F-Kit
Adaptive Pattern Combination: EC-01F
Packaging: DIP-14(2.54Spacing standard row needle)
Size: 33.9*28.4*13(0.2)mm
Antenna Form: NB:External SMA antenna
Spectral Range: Band3, Band5, Band8
Working Temperature: -40C ~ 85C
Storage Environment: -40 C ~ 125 C, < 90%RH
Supply District: 5V Micro USB or pin 3.3V power supply
Support Interface: UART/I2C/PWM/ADC/GPIO
IO Quantity: 8(contain TX0\RX0 TX1\RX1)
Series Rate: Support 110 ~ 4608000 bps ,Default9600 bps
Bluetooth: Nonsupport
Security: AES/SHA
Flash: 4MB NOR Flash
Module Power Consumption: Sleep mode(PSM):0.9uA (Single Module); Standby mode(DRX):120uA (Single Module); Full load mode (TX:23Bm): 240mA (Single Module)