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spark_abacus
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remove PZEM documentation

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King Kévin 2017-01-22 16:34:46 +01:00
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README.md
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@ -14,7 +14,7 @@ More information is available on the [wiki](https://wiki.cuvoodoo.info/doku.php?
board
-----
The development board used for this project is a [blue pill](https://wiki.cuvoodoo.info/doku.php?id=stm32f1xx#blue_pill).
The development board used for this project is a [system board](https://wiki.cuvoodoo.info/doku.php?id=stm32f1xx#system_board).
This offers a [STM32F103C8T6 micro-controller](http://www.st.com/web/en/catalog/mmc/FM141/SC1169/SS1031).
peripherals
@ -30,8 +30,6 @@ LED
- query (yellow): goes on when starting to query the measurement values from all electricity meters, and goes off when it received all values.
- submit (blue): goes on when it start submitting the values to the database (using an HTTP POST on influxDB), and goes off when the submission succeeded.
Note: don't use the onboard LED on PC13 on the blue pill as switching it heavily influences the RTC.
Connections LED (cathode) <-> board (all LED anodes are connected to the +3.3V rail):
- power; GND
@ -64,17 +62,6 @@ Connections DDM100TC <-> board:
- S0+, pin 8; +3.3V or +5V
- S0-, pin 7; PB6, TIM4_CH1 (add pull-down resistor)
PZEM-004T
---------
This 1-phase 2-wire electricity meter provides a UART interface.
For the 3-phase 4-wire power distribution installation I used 3 meters, one per phase.
Because each command includes a device address, they can be connected to the same UART port (one individual addresses have been set).
All meters are periodically (see RTC) sequentially queried for their measurements (voltage, current, power, energy).
The used addresses are hard coded in `main.c`
A timer is used to guarantee a minimum (undocumented in the specification) time between requests in order to improve the response success.
Connections 3xPZEM-004T <-> board:
- 5V, 1; +5V (+3.3V is not sufficient)
@ -125,12 +112,12 @@ The hostname, port, database name, user name, and password are hard coded in `ma
Connections ESP-01 <-> board:
- GND, pin 1; ground
- TX, pin 2; PA10, USART1_RX
- TX, pin 2; PA3, USART2_RX
- GPIO2, pin 3; not connected
- CH_PD, pin 4; pull-up resistor
- GPIO0, pin 5; not connected
- RST, pin 6; pull-up resistor
- RX, pin 7; PA9, USART1_TX
- RX, pin 7; PA2, USART2_TX
- VCC, pin 8; +3.3V (add a large capacitor to cope with power spikes)
code