CC1101 docs

content/components/_index.md

@@ -1036,6 +1036,7 @@ Used for creating infrared (IR) or radio frequency (RF) remote control transmitt
 ESPHome to cellular networks. **Does not encompass Wi-Fi.**
 
 {{< imgtable >}}
+"CC1101","components/cc1101","cc1101.webp",""
 "IR Remote Climate","components/climate/climate_ir","air-conditioner-ir.svg","dark-invert"
 "Remote Receiver","components/remote_receiver","remote.svg","dark-invert"
 "Remote Transmitter","components/remote_transmitter","remote.svg","dark-invert"

content/components/cc1101.md

@@ -0,0 +1,208 @@
+---
+title: CC1101 Low-Power Sub-1 GHz RF Transceiver
+description: Instructions for setting up CC1101 RF Transceiver in ESPHome.
+image: /components/images/cc1101.webp
+keywords: [cc1101]
+---
+
+The **CC1101** component provides a driver for the **Texas Instruments CC1101** Sub-1 GHz RF Transceiver.
+It allows you to transmit and receive raw RF signals (ASK/OOK, FSK, etc.) using the standard
+[Remote Transmitter](remote_transmitter.md) and [Remote Receiver](remote_receiver.md) components.
+
+This component requires the [SPI Component](spi.md) to be enabled.
+
+<img src="/components/images/cc1101.webp" alt="Image" width="50.0%" class="align-center">
+
+## Component Configuration
+
+```yaml
+# Minimal Example
+cc1101:
+  cs_pin: GPIOXX
+  frequency: 433.92MHz
+```
+
+## Configuration Variables
+
+### Hardware Settings
+
+- **cs_pin** (**Required**, [Pin](pin.md)): The SPI Chip Select (CSN) pin connected to the module.
+
+### General Settings
+
+- **frequency** (*Optional*, frequency): The operating frequency. Range: `300MHz` to `928MHz`. Default: `433.92MHz`.
+- **output_power** (*Optional*, float): The transmission power in dBm. Range: `-30` to `11`. Default: `10`.
+- **modulation_type** (*Optional*, enum): The modulation format. Options: `ASK/OOK` (default), `2-FSK`, `4-FSK`, `GFSK`, `MSK`.
+- **symbol_rate** (*Optional*, int): The symbol rate in Baud. Range: `600` to `500000`. Default: `5000`.
+- **rx_attenuation** (*Optional*, enum): Internal RX attenuation. Options: `0dB`, `6dB`, `12dB`, `18dB`. Default: `0dB`.
+- **dc_blocking_filter** (*Optional*, boolean): Enable the digital DC blocking filter. Default: `True`.
+
+### Tuner Settings
+
+- **filter_bandwidth** (*Optional*, frequency): The receive filter bandwidth. Range: `58kHz` to `812kHz`. Default: `203kHz`.
+- **fsk_deviation** (*Optional*, frequency): Frequency deviation for FSK/GFSK modulation.
+- **channel** (*Optional*, int): Channel number (added to base frequency).
+- **channel_spacing** (*Optional*, frequency): Spacing between channels.
+- **if_frequency** (*Optional*, frequency): Intermediate Frequency. Default is optimized for 433MHz usage.
+- **pktlen** (*Optional*, int): Packet length config.
+
+### AGC (Automatic Gain Control) Settings
+
+Advanced users can fine-tune the AGC dynamics.
+
+- **magn_target** (*Optional*, dB): Target signal amplitude. Range: `24dB` to `42dB` in increments of 3(eg. `33dB`).
+- **max_lna_gain** (*Optional*, dB): Maximum LNA gain reduction. Options: `Default`, `2.6dB`, `6.1dB`, `7.4dB`, `9.2dB`, `11.5dB`, `14.6dB`, `17.1dB`.
+- **max_dvga_gain** (*Optional*, enum): Maximum Digital Variable Gain reduction. Options: `Default`, `-1`, `-2`, `-3`.
+- **lna_priority** (*Optional*, boolean): If true, decrease LNA gain before DVGA gain.
+- **carrier_sense_abs_thr** (*Optional*, int): Absolute RSSI threshold for Carrier Sense.
+- **carrier_sense_rel_thr** (*Optional*, enum): Relative RSSI threshold for Carrier Sense.
+- **filter_length_fsk_msk** (*Optional*, enum): Averaging length for FSK/MSK.
+- **filter_length_ask_ook** (*Optional*, enum): Averaging length for ASK/OOK.
+- **freeze** (*Optional*, enum): AGC gain freeze behavior.
+- **wait_time** (*Optional*, enum): AGC wait time.
+- **hyst_level** (*Optional*, enum): AGC hysteresis level.
+
+## Actions
+
+This component provides actions to control the radio state, primarily used for coordinating transmission.
+
+- **cc1101.begin_tx**: Wakes the radio and forces it into TX mode. This **must** be called before `remote_transmitter` starts sending data.
+- **cc1101.end_tx**: Puts the radio back into RX mode and resets the pin configuration to safe defaults.
+- **cc1101.reset**: Resets the CC1101 chip and re-applies configuration.
+- **cc1101.set_idle**: Puts the radio into idle state.
+
+## Integration with Remote Receiver/Transmitter
+
+The component automatically configures the GDO pins to support both dual and single pin wiring schemes without any extra configuration.
+
+### 1. Dual Pin Wiring (Recommended)
+
+This is the simplest and recommended wiring scheme. It uses separate pins for transmitting and receiving data.
+
+- **GDO0 (Module Pin 3)**: Connect to the MCU pin used by `remote_transmitter`.
+- **GDO2 (Module Pin 8)**: Connect to the MCU pin used by `remote_receiver`.
+
+```yaml
+cc1101:
+  cs_pin: GPIOXX
+
+remote_transmitter:
+  pin: GPIOXX # Must match GDO0
+  carrier_duty_percent: 100%
+  on_transmit:
+    then:
+      - cc1101.set_idle:
+      - remote_transmitter.digital_write: false
+      - cc1101.begin_tx:
+  on_complete:
+    then:
+      - cc1101.set_idle:
+      - remote_transmitter.digital_write: true
+      - cc1101.end_tx:
+
+remote_receiver:
+  pin: GPIOXX # CC1101 GDO2
+  dump: all
+```
+
+### 2. Single Pin Wiring
+
+This wiring scheme uses a single MCU pin for both transmitting and receiving data, connected to GDO0. This requires careful configuration of the `remote_transmitter` and `remote_receiver` to avoid conflicts. Using an open-drain pin mode is recommended to simplify the setup.
+
+- **GDO0 (Module Pin 3)**: Connect to a single MCU GPIO pin.
+- **GDO2 (Module Pin 8)**: Leave disconnected.
+
+#### Single Pin with Open-Drain (Recommended for Single Pin)
+
+This is the recommended method for single-pin wiring as it avoids complex automations to switch pin modes.
+
+```yaml
+cc1101:
+  cs_pin: GPIOXX
+  operation_mode: SINGLE_PIN
+
+remote_transmitter:
+  pin:
+    number: GPIOXX # Must match GDO0
+    mode:
+      input: true
+      output: true
+      pullup: true
+      open_drain: true
+    allow_other_uses: true
+    eot_level: false
+  carrier_duty_percent: 100%
+  on_transmit:
+    then:
+      - cc1101.set_idle:
+      - remote_transmitter.digital_write: false
+      - cc1101.begin_tx:
+  on_complete:
+    then:
+      - cc1101.set_idle:
+      - remote_transmitter.digital_write: true
+      - cc1101.end_tx:
+
+remote_receiver:
+  pin:
+    number: GPIOXX # Must match GDO0
+    mode:
+      input: true
+      output: true
+      pullup: true
+      open_drain: true
+    allow_other_uses: true
+  dump: all
+```
+
+#### Single Pin with Push-Pull
+
+This method requires automations to manually enable and disable the receiver around transmissions to prevent the transmitter from receiving its own signals.
+
+```yaml
+cc1101:
+  cs_pin: GPIOXX
+
+remote_transmitter:
+  pin:
+    number: GPIOXX # Must match GDO0
+    allow_other_uses: true
+  carrier_duty_percent: 100%
+  on_transmit:
+    then:
+      - remote_receiver.disable:
+      - cc1101.set_idle:
+      - remote_transmitter.digital_write: false
+      - cc1101.begin_tx:
+  on_complete:
+    then:
+      - cc1101.set_idle:
+      - remote_transmitter.digital_write: true
+      - cc1101.end_tx:
+      - remote_receiver.enable:
+
+remote_receiver:
+  pin:
+    number: GPIOXX # Must match GDO0
+    allow_other_uses: true
+  dump: all
+```
+
+## Troubleshooting
+
+### "FF0F was found" Error
+
+If you see a log entry stating `FF0F`, `0000`, or `FFFF` during setup, this indicates an SPI communication failure. Check your wiring (MISO/MOSI/CS).
+
+### No Signal during Transmit
+
+- **Check Pinout**: For all modes, the data line must be connected to GDO0 (Module Pin 3), as the CC1101 chip only supports transmission input via the GDO0 pin.
+- **Check Pin Mode**: If using the Single Pin Push-Pull mode, ensure your on_transmit/on_complete logic correctly flips the pin's status.
+
+## See Also
+
+- [I²C Bus](/components/i2c)
+- [Remote Receiver](/components/remote_receiver)
+- [Remote Transmitter](/components/remote_transmitter)
+- [SPI Component](/components/spi)
+- [CC1101 Datasheet](https://www.ti.com/lit/ds/symlink/cc1101.pdf)