computer to the Uno USB port. Programming the
ESP8266s (applies to ESP8266-01, Itead S20, and Itead
Sonoff) will require use of a USB to serial (FTDI) adapter.
These are available from many sites, including
Bangood.com, SparkFun.com, Adafruit.com, and
Note that the ESP8266 boards all require 3. 3 VDC for
programming and operation. The FTDI adapter you
choose must have the option to operate at 3. 3 VDC
because the read and write lines on the ESP8266 are
designed for 3. 3 volts, and five volts will damage the serial
port. The ESP8266 can draw up to 300 mA during
operation, so your FTDI board must be able to supply 3. 3
VSC at up to 300 mA.
Most FTDI boards do not provide a voltage regulator
that can handle the current demand of the ESP8266. If
you have a low current FTDI board, you can use a
separate 3. 3 VDC power supply to run the ESP during
programming and testing.
To establish the programming mode on the ESP8266-
01, you need to energize the board with the GPIO0 pin
momentarily grounded and all other control pins pulled
high. Connect transmit from the ESP8266 to receive on
the FTDI interface and connect receive on the ESP8266 to
transmit on the FTDI interface. Connect the ESP8266
ground to ground or negative of the FTDI interface, and
connect Vcc to + 3. 3 VDC. The FTDI interface you
purchase must be installed on your computer for the
Arduino IDE to be able to communicate with it.
To establish the programming mode on the Itead
devices (S20 and Sonoff), momentarily press the
36 September 2017
Additional Details on X- 10
X- 10 sends the control signal to its modules over the
power line. There are many potential causes for weak X- 10
signals. All rooms on one level meant longer runs of
power wires to room outlets, and Ground Fault Circuit
Interrupters (GFCIs) were installed on many branch
GFCIs have bypass capacitors to minimize spurious
tripping, but these capacitors shunt X- 10 signals to
ground, preventing X- 10 functionality without repeaters.
Also, X- 10 signals become attenuated when they go
through the power company transformer to reach the
other side of your house wiring.
In addition, I have found that many home electronic
components and uninterruptable power supplies contain
bypass capacitors to minimize EMI and RFI interference,
but these capacitors also shunt the X- 10 signal.
The PicoScope 4824 is a low-cost, portable solution for multi-input applications. With 8 high-resolution analog channels you
can easily analyze audio, ultrasound, vibration, power and
timing of complex systems.
The PicoScope 4824 has the power and functionality to deliver
accurate results. It also features deep memory to analyze
multiple serial buses such as UART, I2C, SPI, CAN, CAN FD
and LIN plus control and driver signals.
• High-performance arbitrary waveform generator
• Advanced digital triggers
• Serial bus decoding
• SuperSpeed USB 3.1 Gen 1 interface
• Windows, Mac and Linux software
resolution 20 MHz bandwidth
For more information please visit www.picotech.com/us108
Email: firstname.lastname@example.org. Errors and omissions excepted. Please contact Pico Technology for the latest prices before ordering.
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