New products based on ESP32

It was a matter of time until some product on the market will incorporate the ESP32 as the core controller. TECHBASE's first industrial gateways series is based on new ESP32 chips.

They are selling it in two variants ModuinoX1 and ModuionoX2 For the second one you get:

• more DIO ports
•  microSD 
•  2 extra analog inputs 
•  a wider form factor.

Moduino X1 and Moduino X2

On request both modules can be shipped with:

• LoRa
• SigFox
• LTE NB 
• Zigbee
• OLED 0.96″ 128×64

Bluetooth and WiFi are provided by default since are encapsulated into the ESP32.

Moduino is not coming with the software, its up to you  to write your software. Still not clear if you can put them in sleep mode for battery power applications.

Price range is not published at this time you will need to contact them.

You can find more informations about the products here and here.

ESP32 increase the maximum number of sockets

Still didn't found an ESP32 with a decent delivery price so today I've tested the environment provided by EspressIf looking on the maximum number of sockets. On ESP8266 I've managed to have more then 20 sockets opened and carrying MQTT packets ( see https://myesp8266.blogspot.co.uk/2016/11/mqtt-broker-on-esp8266-5.html)

I've noticed that the maximum number of sockets that you can setup from make menuconfig is 16. 

All the values that you are setting from make menuconfig are ending in a file named sdkconfig in the root of you app directory. This sdkconfig file will be converted to sdkconfig.h located in app/build/include/sdkconfig.h.

Even you are modifying a value direct in the sdkconfig on the compile time you will be invited to enter a value 1..16 for maximum number of sockets.

Solution #1. (Safest one)

Change the sdkconfig.h file overwrite the desired value and recompile

#define CONFIG_LWIP_MAX_SOCKETS 20

Solution #2. (not recommended but possible )

Modify directly the file:

esp-idf/components/lwip/include/lwip/port/lwipopts.h
#define MEMP_NUM_NETCONN          20 //CONFIG_LWIP_MAX_SOCKETS


If you modified values in make menuconfig and you don't know what was before don't worry just do a diff between the app/sdkconfig and app/sdkconfig.old file.

ESP32 is on preorder

Good new today !!!

Today the ESP32 is on preoder on banggood. Delivery will start by the end of October.

If you are in the first 50 orders $7.69, up to 200 $8.69 and $9.69 after that.

As a reminder the specs from the official espressif site are:

Key Features

• 240 MHz dual core Tensilica LX6 microcontroller with 600 DMIPS
• Integrated 520 KB SRAM
• Integrated 802.11BGN HT40 Wi-Fi transceiver, baseband, stack and LWIP
• Integrated dual mode Bluetooth (classic and BLE)
• 16 MByte flash
• 2.2V to 3.6V operating voltage
• -40°C to +125°C operating temperature
• On-board PCB antenna / IPEX connector for external antenna

Sensors

• Ultra low noise analog amplifier
• Hall sensor
• 10x capacitive touch interface
• 32 kHz crystal oscillator

32x GPIO

• 3 x UARTs, including hardware flow control
• 3 x SPI
• 2 x I2S
• 12 x ADC input channels
• 2 x DAC
• 2 x I2C
• PWM/timer input/output availabe on every GPIO pin
• OpenOCD debug interface with 32 kB TRAX buffer
• SDIO master/slave 50 MHz
• Supports external SPI flash up to 16 MB
• SD-card interface support

Security Related

• WEP, WPA/WPA2 PSK/Enterprise
• Hardware accelerated encryption: AES / SHA2 / Elliptical Curve Cryptography / RSA-4096

Performance

• Supports sniffer, station, softAP and Wi-Fi direct modes
• Max data rate of 150 Mbps@11n HT40, 72 Mbps@11n HT20, 54 Mbps@11g, and 11 Mbps@11b
• Maximum transmit power of 19.5 dBm@11b, 16.5 dBm@11g, 15.5 dBm@11n
• Minimum receiver sensitivity of -98 dBm
• 135 Mbps UDP sustained throughput
• 2.5 μA deep sleep current

MQTT Broker on ESP32 #2

MQTT Broker on ESP32

I've managed to put an MQTT broker on ESP32 (aka ESP31B).

The code is under development and ESP32 at this time is not yet released, but when it will be I'll also have the code complete. There are some problems but let's hope they will be resolved by the Espressif System. 

I will try to see if I can do the same with ESP8266 which is already on the market. 

Don't forget that the same broker is running on its little brother ESP8266. Check it here.

MQTT Broker on ESP32

Code from ESP8266 has been ported to ESP32 module, except the WI-Fi configure that was using  functions not present into the FreeRTOS SDK.

Everything is working great, having more heap is a big relief. In the next SDK EspressIf must tune a little bit the window sizes and some buffers in FreeRTOS so will achieve same performance like the ESP8266 FreeRTOS SDK.

It's a boy, it is ESP32

I've managed to solder the ESP32 board to its docking board.

After connecting the console everything is up and running.

And looking with my phone I can see the ESP32 in AP mode. 

Setup environment for ESP32

In order to develop something with the ESP32 you need to setup the environment for it.

I am hopping that Santa will bring me an ESP31 ( the prerelease model for ESP32).

Usually I create a VM for this. After I've installed the lumbuntu 15.04 in a Virtual Box and the Guest Addition now is time for compiler stuff.

The following commands are from espressif github with few modification for using the lumbutu i386 VM.

Step 1. Install the required toolchain packages.

sudo apt-get install git autoconf build-essential gperf bison flex texinfo libtool libncurses5-dev wget gawk libc6-dev python-serial libexpat-dev libtool-bin

Step 2. Create a directory (e.g./opt/Espressif) to store the toolchain.

sudo mkdir /opt/Espressif

Step 3. Make the current user the owner.

sudo chown $USER /opt/Espressif/

Step 4. Download the latest toolchain installation file to the directory created in Step 2.

cd /opt/Espressif/git clone -b esp108-1.21.0 git://github.com/jcmvbkbc/crosstool-NG.git

Step 5. Install toolchain.

cd crosstool-NG./bootstrap && ./configure --prefix=`pwd` && make && make install
./ct-ng xtensa-esp108-elf
./ct-ng build

The command ./ct-ng build takes some time(30-40minutes), so grab a coffee or a cup with tea.

Step 6. Set the PATH variable to point to the newly compiled toolchain.

export PATH=/opt/Espressif/crosstool-NG/builds/xtensa-esp108-elf/bin:$PATH

Note： You need to do Step 6 once you open a new shell, or you can put it inside your .bashrc file

Project template Compile

Step 1. Create a directory (e.g.~/Workspace) to store a new project.

mkdir ~/Workspace

Step 2. Clone ESP32 RTOS SDK.

cd ~/Workspacegit clone https://github.com/espressif/ESP32_RTOS_SDK.git

Step 3. Copy ESP32_RTOS_SDK/examples/project_template to Workspace directory created in Step 1.

cp -R ~/Workspace/ESP32_RTOS_SDK/examples/project_template ~/Workspace/

Step 4. Create a directory (e.g.~/Workspace/ESP32_BIN) to store the bin files compiled.

mkdir ~/Workspace/ESP32_BIN

Step 5. Set SDK_PATH as the path of SDK files and BIN_PATH as the path of .bin files compiled.

export SDK_PATH=~/Workspace/ESP32_RTOS_SDK
export BIN_PATH=~/Workspace/ESP32_BIN

Notice： Make sure you set the correct paths, or it will occur a compile error.

Step 6. Start to compile files

make cleanmake

Now in ESP32_BIN directory you have the bin files.