sim7020 2.2.0

driver for sim7020E NB IoT modem
Documentation 
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use crate::at_command::{AtRequest, AtResponse, BufferType};
use crate::AtError;

#[cfg_attr(feature = "defmt", derive(defmt::Format))]
pub struct SignalQualityReport;

impl AtRequest for SignalQualityReport {
    type Response = Result<(), AtError>;

    fn get_command<'a>(&'a self, buffer: &'a mut BufferType) -> Result<&'a [u8], usize> {
        at_commands::builder::CommandBuilder::create_execute(buffer, true)
            .named("+CSQ")
            .finish()
    }

    fn parse_response(&self, data: &[u8]) -> Result<AtResponse, AtError> {
        // \r\n+CSQ: 24,0\r\n\r\nOK\r\n
        // c.f.GSM 05.08, section 8.2.4
        let (rx_signal_strength, rx_quality) = at_commands::parser::CommandParser::parse(data)
            .expect_identifier(b"\r\n+CSQ: ")
            .expect_int_parameter()
            .expect_int_parameter()
            .expect_identifier(b"\r\n\r\nOK")
            .finish()?;
        Ok(AtResponse::SignalQuality(rx_signal_strength, rx_quality))
    }
}