06

7.0

ESP32 Peripherals

Table 2 – Peripherals

* Requires an external CAN bus transceiver, we recommend the SN65HVD230 from Texas Instruments.

Peripheral

Count

Pins

UART

3

Remappable to any GPIO.

Note: P13–18 can only be mapped to RX or CTS since they are input only.

I2C

2

Remappable to any GPIO except P13–18 since they are input only and I2C is bi–directional.

SPI

3

Remappable to any GPIO.

Note: P13–18 can only be mapped to MISO since they are input only.

CAN*

1

Remappable to any GPIO.

Note: P13–18 can only be mapped to RX since they are input only.

JTAG

1

TDO = P4, TDI = P9, TCK = P10, TMS = P24

PWM

1

All GPIO except P13–18 which are input only

ADC

18

Fixed mapping, see Table 1, Only ADC 1 is supported in our micropython firmware.

DAC

2

Only available on P21 and P22

SD

1

DAT0 = P8, SCLK = P23, CMD = P4

8.0

Programming the device

8.1

UART

By default, the modules run an interactive python REPL

on UART0 which is connected to P0 (RX) and P1 (TX)

running at 115200 baud. The easiest way to connect to

the FiPy is via our expansion board, but any USB UART

adapter will suffice. Code can be run via this interactive

REPL or you can use our PyMakr plugin for Atom or

Visual Studio Code to upload code to the board.

8.2

Wi–Fi

By default, the FiPy also acts as a Wi–Fi access point

SSID: fipy–wlan–XXXX

Password: www.pycom.io

Once connected to the FiPy’s Wi–Fi network you can

access it in two ways.

8.2.1 Telnet

Running on port 23 is a telnet server. This acts in a

very similar way to the UART. It presents you with an

interactive REPL and can also be used to upload code

via PyMakr.

8.2.2

FTP

The FiPy also runs a FTP server that allows you to copy

files to and from the device, include an SD card if one is

connected. To connect to this FTP server, you need to use

plain FTP (un–encrypted) with the following credentials:

User: micro

Password: python

For a more detailed description of the ESP32 peripherals

along with peripherals not currently supported by our

firmware, please check the ESP32 datasheet.

7.1

RTC

Our modules by default all use the internal RC oscillator at

150kHz for the RTC. In the case of the FiPy, the external

RTC pins are used by the LTE module, and therefore the

external RTC oscillator is not available.