Cavli Wireless P32 Series User manual

Cavli P32 Series Modules
Evaluation Kit
P32 Series EVK Hardware Manual
Release Version 1.2
www.cavliwireless.com
Copyright © 2019 by Cavli Wireless Inc.
All rights reserved. All document materials, including, without limitation, the logos, design, text, graphics, other files and the selection and
arrangement are copyrighted as otherwise noted on the linked page. No part of this publication may be reproduced, distributed, or transmitted in
any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of
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law. For permission requests, are allowed only for company with registered customer ID within Cavli Wireless. Write to [email protected] for
registering the company.
Cavli Wireless Inc.
177 Park Avenue
San Jose, California, USA 95113
www.cavliwireless.com
Designed in USA

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Table of Contents
Introduction ......................................................................................................................................2
Technical Specifications ....................................................................................................................3
Pin Layout.........................................................................................................................................4
Pin Description..................................................................................................................................5
Power................................................................................................................................................5
Reset.................................................................................................................................................6
Boot ..................................................................................................................................................6
Main Interface...................................................................................................................................6
LED Indicator ....................................................................................................................................8
Guidelines .........................................................................................................................................8
Setting Up Arduino Platform(Windows).............................................................................................9
Setting Up Arduino Platform(Ubuntu)..............................................................................................10
Setting Up ESP-IDF Platform(Ubuntu) .............................................................................................11
Setting Up ESP-IDF Platform(Windows)...........................................................................................13
Sample Code ...................................................................................................................................14
Dimensions......................................................................................................................................15

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Introduction
The P32 evaluation kit provides users to test and develop their own applications on P32
series modules. There are three modules which P32EVK supports.
oP32C1RS
oP32C31QM
oP32C1RM

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Technical Specifications
Characteristic
Describe
Physical
characteristics
55.93mm*30.24mm*5.53mm
On Board LEDS
Status, Netact, Power and Uled
Working voltage
5V
Buttons
Reset and Boot
General Purpose IO pins
12
Status pins
AP_READY and W_DISABLE
SMA Connector
One SMA connector with 50 ohm impedence
USB Connector
UDP/TCP/CoAP/LWM2M
PPP/SSL/DTLS/FTP
HTTP/MQTT/HTTPS
Antenna interface
50 Ω interface of the main antenna
50 Ω interface of Bluetooth antenna
Firmware update
Serial port upgrade
Temperature range
Normal working temperature - 20℃to +70℃
Limit working temperature - 40℃to +85℃
Storage temperature: -45℃to +90℃

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Pin Layout

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Pin Description
Pins
Pins name
IO
Functional description
Remarks
1
V3V7
PO
Modem Voltage
Input Voltage
2
V3V3
PO
MCU Voltage
2.8 Voltage domain
3
GND
Ground Signal
GND
4
RXD
DI
Master Data Reception
3.3 Voltage domain
5
TXD
DO
Master Data
Transmission
3.3 Voltage domain
6
IO4
IO
General Purpose IO
3.3 Voltage domain
7
AP_READY
DO
AP Sleep state detection
1.8 Voltage domain
8
IO2
IO
General Purpose IO
3.3 Voltage domain
9
IO15
IO
General Purpose IO
3.3 Voltage domain
10
IO13
IO
General Purpose IO
3.3 Voltage domain
11
W_DISABLE
DO
Airplane Mode Control
1.8 Voltage domain
12
IO5
IO
General Purpose IO
3.3 Voltage domain
13
IO34
IO
General Purpose IO
3.3 Voltage domain
14
IO35
IO
General Purpose IO
3.3 Voltage domain
15
IO32
IO
General Purpose IO
3.3 Voltage domain
16
IO33
IO
General Purpose IO
3.3 Voltage domain
17
IO25
IO
General Purpose IO
3.3 Voltage domain
18
VIN
PI
Main Power Supply
5V
19
IO19
IO
General Purpose IO
3.3 Voltage domain
20
IO14
IO
General Purpose IO
3.3 Voltage domain
Power
The voltage input range of the power supply of P32EVK Board is 5V. There are two
methods to power the board.
●USB Mode: User can power the board using USB connector
●PIN Mode: User can power the board using VIN and GND pin respectively.

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P32EVK has two output voltage ie., V3V3 and V3V7 pins has regulated 3.3 and 3.7
voltages respectively.
Notes:
1. User should not power the board via USB port and pins simultaneously, it will
damage the device permanently.
2. Make sure, the power supply is stable and can deliver enough current.
Reset
The P32EVK can be reset using pressing the RESET button on the board.
Boot
Boot button is used for programming purpose. User need to press the boot button and then
reset button to enter in the boot mode of the microcontroller.
Main Interface
UART interface
P32EVK serial port baud rate can be set to 115200.When users want to use the full function
serial port, you can refer to the following connection mode

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Pin
Pin Name
IO
Functional Description
Remarks
4
RXD
DI
Master Data
Reception
2.8/1.8 Voltage domain
5
TXD
DO
Master Data
Transmission
2.8/1.8 Voltage domain
Note:
●While programming, configure the upload speed to 921600. The detailed information is
given in the guidelines.
IO Pins
P32EVK has 12 GPIO pins which can be assigned various functions by programming the
appropriate registers.There are several kinds of GPIOs: digital-only, analog-enabled, capacitive-
touch-enabled, etc. Analog-enabledGPIOs and Capacitive-touch-enabled GPIOs can be
configured as digital GPIOs.
Pin
Pin Name
IO
Functional Description
Remarks
6
IO4
IO
General Purpose IO
2.8/1.8 Voltage domain
8
IO2
IO
General Purpose IO
2.8/1.8 Voltage domain
9
IO15
IO
General Purpose IO
2.8/1.8 Voltage domain
10
IO13
IO
General Purpose IO
2.8/1.8 Voltage domain
12
IO5
IO
General Purpose IO
2.8/1.8 Voltage domain
13
IO34
IO
General Purpose IO
2.8 Voltage domain
14
IO35
IO
General Purpose IO
2.8 Voltage domain
15
IO32
IO
General Purpose IO
2.8 Voltage domain
16
IO33
IO
General Purpose IO
2.8 Voltage domain
17
IO25
IO
General Purpose IO
2.8 Voltage domain
19
IO19
IO
General Purpose IO
2.8/1.8 Voltage domain
20
IO14
IO
General Purpose IO
2.8/1.8 Voltage domain

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LED Indicator
There are three LED indicators and general purpose led on the board.
Pin
Pin Name
IO
Functional
Description
Remarks
1
STATUS
Network status
Indication
2
NETLIGHT
Network Indicator
3
POWER
Power Indicator
4
VLED
General Purpose LED
Guidelines
Programming Guide (EVK):
●Power the EVK through either USB port or VIN(5V) and GND pin.
●Connect COM PORT via U0TXD and U0RXD pins or through on board
USB port
●Press BOOT button and then press RESET button to enable ESP32 BOOT
mode, when it entered in BOOT mode, a BOOT message will be displayed
in the COM port.
●Flash the firmware to P32 Series module at upload speed of 256000
●After successful firmware flash, reset the module by pressing RESET
button
✔Programing Consoles : Arduino, ESP IDF
✔Upload Speed –926000/256000
✔CPU Frequency –40MHz (Mandatory)
✔Flash size –2MB (Mandatory)
✔The library packages of P32 Series can be found in the https://github.com/cavli-
wireless
✔To disable the output log, following steps should be considered:
oGPIO15 - Pull down to ground: Disable ROM Bootloader output
oMake menuconfig –Bootloader config –Bootloader log verbosity –
No output
oMake menuconfig –Component config –Log Output –Default Log
Verbosity –No output
Notes:
3. User should not power the board via USB port and pins simultaneously, it will
damage the device permanently.
4. Make sure, the power supply is stable and can deliver enough current.

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Setting Up Arduino Platform(Windows)
STEP 1: Now, let’s get started. The first step would be to download and install the
Arduino IDE. This can be done easily by following the link
https://www.arduino.cc/en/Main/Software and downloading the IDE for free. If you
already have one make sure it is of the latest version.
STEP 2: Go to File->Preferences.
Enter https://dl.espressif.com/dl/package_esp32_index.json into the “Additional Boards
Manager URLs” field as shown in the figure below.
Then, click the “OK” button:
Note: if you already have the ESP8266 boards URL, you can separate the URLs with a
comma.
STEP 3: Open Arduino and go to Tools->Board->Board Manager. Select Type as “All”
and search for esp32 by Espressif Systems and install the same. Close the window after
installation.
STEP 4: Connect your ESP32 board to your computer through the micro-USB cable.
Make sure the red LED goes high ON the module to ensure power supply.
STEP5: Start the Arduino IDE and navigate to Tools -> Boards and select
ESP32Dev board.
STEP6: Go back to Arduino IDE and under Tools -> Port select the Port to which your ESP
is connected to.
STEP7: Let’s upload the Blink Program, to check if we are able to program our ESP32
module. This program should blink the LED at an interval of 1 second.
STEP 6: To upload the code, just click on upload and you should see the Arduino console
displaying the following if everything works as expected.
Flash Configuration:

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Setting Up Arduino Platform(Ubuntu)
STEP 1: Now, let’s get started. The first step would be to download and install the
Arduino IDE. This can be done easily by following the
link https://www.arduino.cc/en/Main/Software and downloading the IDE for free. If you
already have one make sure it is of the latest version.
STEP 2: Unzip the folder and open the terminal. Run the following command.
./install.sh
STEP 3: Allow non root user to use tty0 (USB to Serial converter) serial communication
with ESP32
sudo usermod -a -G dialout $USER
STEP 4: Go to File->Preferences.
Enter https://dl.espressif.com/dl/package_esp32_index.json into the “Additional Boards
Manager URLs” field as shown in the figure below.
Then, click the “OK” button:
Note: if you already have the ESP8266 boards URL, you can separate the URLs with a
comma.
STEP 5: Open Arduino and go to Tools->Board->Board Manager. Select Type as “All”
and search for esp32 by Espressif Systems and install the same. Close the window after
installation.
STEP 6: Connect your ESP32 board to your computer through the micro-USB cable.
Make sure the red LED goes high ON the module to ensure power supply.

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STEP 7:Start the Arduino IDE and navigate to Tools -> Boards and select
ESP32Dev board.
STEP 8: Go back to Arduino IDE and under Tools -> Port select the Port to which your
ESP is connected to.
STEP 9: Let’s upload the Blink Program, to check if we are able to program our ESP32
module. This program should blink the LED at an interval of 1 second.
STEP 10: To upload the code, just click on upload and you should see the Arduino
console displaying the following if everything works as expected.
Flash Configuration:
Setting Up ESP-IDF Platform(Ubuntu)
STEP 1: Installing Toolchain: Open Terminal and run the following command
sudo apt-get install git wget libncurses-dev flex bison gperf python python-pip python-
setuptools python-serial python-click python-cryptography python-future python-pyparsing
python-pyelftools cmake ninja-build ccache
Step2: With some Linux distributions you may get
the Failed to open port /dev/ttyUSB0 error message when flashing the ESP32. This can
be solved by running following two commands

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sudo usermod -a -G dialout $USER
Step3: Get ESP-IDF Open Terminal, and run the following commands:
cd ~/esp
git clone --recursive https://github.com/espressif/esp-idf.git
Step4: Set up the tools: Aside from the ESP-IDF, you also need to install the tools used
by ESP-IDF, such as the compiler, debugger, Python packages, etc.
cd ~/esp/esp-idf
./install.sh
Step5: Set up the environment variables: In the terminal where you are going to use
ESP-IDF, run:
. $HOME/esp/esp-idf/export.sh
Step6: Start a Project: Now you are ready to prepare your application for ESP32. You
can start with get-started/hello_world project from examples directory in IDF.
cd ~/esp
cp -r $IDF_PATH/examples/get-started/hello_world .
Step7: Connect your device: Now connect your ESP32 board to the computer and check
under what serial port the board is visible. Serial ports have the patterns in their name
/dev/tty
Step8: Configure: Navigate to your hello_world directory from Step 5. Start a Project and
run the project configuration utility menuconfig.
cd ~/esp/hello_world
make menuconfig
If the previous steps have been done correctly, the following menu appears:

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Step9: Compile the application by running following command
Make
Step10: Flash the program into the chip
Make flash
Setting Up ESP-IDF Platform(Windows)
STEP 1: The easiest way to install ESP-IDF’s prerequisites is to download the ESP-IDF
Tools installer from this URL:
https://dl.espressif.com/dl/esp-idf-tools-setup-2.0.exe
The installer includes the cross-compilers, OpenOCD, cmake and Ninja build tool, and a
configuration tool called mconf-idf. The installer can also download and run installers
for Python3.7 and Git For Windows if they are not already installed on the computer.
STEP 2: Navigate to the folder C:\msys32\ and open the application mingw32.exe
STEP 3: Open mingw32.exe and run the following commands
git clone --recursive https://github.com/espressif/esp-idf.git
STEP 4: Open vim to add IDF_PATH environment variable to your MYSYS system
cd esp-idf
vim /etc/ profile.d/export_idf_path.sh
Type “i” to enter write/read mode and type the following command
export IDF_PATH=”C:/msys32/home/esp-idf”
Please enter your esp-idf folder path after C:/msys32 and press escape and type “:wq” to
save and exit vim.
Close and reopen MSYS terminal and type “printenv IDF_PATH” to ensure the ESP-IDF is
known by the system

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Step5: Configure: Navigate to your hello_world directory from Step 5. Start a Project and
run the project configuration utility menuconfig.
cd ~/esp/hello_world
make menuconfig
If the previous steps have been done correctly, the following menu appears:
Step6: Compile the application by running following command
Make
Step7: Flash the program into the chip
Make flash
Sample Code
The sample code for -P32 Series modules can be found at https://github.com/cavli-wireless

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Dimensions